With each benefit comes a risk.

0.5 BTC will be my test drive. I'll get 0.025%*0.5 everyday for as long as my coin is there.

I've also researched other interest earning btc websites, www.mycoin.hk for instance, seems not so safe.
But for ChinaBTC (JUA) and Huobi (BitVC), they are probably ok. If they try to run away, their CEO, who are NOT anonymous (actually quite famous in China), and anyone related, will end up in jail.
Thousands of Chinese investers have thrown their coins there. Chinese Gov won't let a scam like this big to happen, not without heavy punishment.

This is one of JUA's previous event (07/2014), a "fixed deposit" one described by OP.
There have been 6 similar events.
The BTCs have been returned to investers, with 1.4% monthly interest paid everyday.


Monthly interest1.40%    Cycle 30day
      23:51:32 1**2 - ฿5.00 ฿3228.99933
    23:51:21 s**m - ฿10.00 ฿3223.99933
    23:50:30 s**m - ฿0.04 ฿3213.99933
    23:49:21 耀**7 1DyyXbvwqtH9gyfhV6y2QDeBDUYrdtoCPM ฿13.31031532 ฿3192.55932532
    23:49:21 x**m 1KWXVgX7t8khqiWxJJSxkGgSrQt9fvgvkn ฿21.00 ฿3213.55933
    23:49:21 1**5 1EUQkB49EGf9B7kvW4awuTiJ9xcQZJppgq ฿0.40 ฿3213.95933
    23:28:18 明**3 - ฿1.10 ฿3179.24901
    23:27:21 情**0 1PHHbzKY3mBRc9eUHqM5MypkiMVcj3ogo6 ฿50.00 ฿3178.14901
    23:10:43 林**8 - ฿1.35 ฿3128.14901
    22:22:16 8**m - ฿0.09 ฿3126.79901
    22:11:21 我**9 1GEZNHu8iR2KpKdrrLZzsS5uPouwnim3i3 ฿0.1389 ฿3124.38901
    22:11:21 我**9 1GEZNHu8iR2KpKdrrLZzsS5uPouwnim3i3 ฿2.32 ฿3126.70901
    22:06:42 f**8 - ฿0.02 ฿3124.25011
    22:02:51 1**m 164yKHG5ENwdgcdcFnqQ6vJ1UvUyPB8hK8 ฿0.0252945 ฿3124.2301145
    20:49:51 q**4 1GirHZREP11nWifNPdfP3aaSn9czfEvXDS ฿2.03 ฿3123.50482
    20:49:51 1**5 1EUQkB49EGf9B7kvW4awuTiJ9xcQZJppgq ฿0.70 ฿3124.20482
    20:34:57 j**m - ฿15.00 ฿3121.47482
    20:23:21 g**m - ฿0.02 ฿3106.47482
    20:11:51 1**5 1EUQkB49EGf9B7kvW4awuTiJ9xcQZJppgq ฿0.20 ฿3106.45482
    19:47:31 9**m - ฿0.25 ฿3106.25482
    19:02:46 y**m - ฿0.80 ฿3106.00482
    18:57:41 c**m - ฿0.01 ฿3105.20482
    18:52:55 y**w - ฿0.01 ฿3105.19482
    18:45:21 x**m 1KWXVgX7t8khqiWxJJSxkGgSrQt9fvgvkn ฿40.00 ฿3105.18482
    18:34:26 1**9 - ฿0.01 ฿3065.18482
    18:32:58 c**m - ฿4.00 ฿3065.17482
    18:16:51 l**m 1HND4p9a5S2qnnjckth1vxBVtcnrUksFEe ฿5.00 ฿3058.68872
    18:16:51 l**m 1HND4p9a5S2qnnjckth1vxBVtcnrUksFEe ฿2.4861 ฿3061.17482
    18:04:02 l**m - ฿0.49 ฿3053.68872
    18:02:51 l**m 1HND4p9a5S2qnnjckth1vxBVtcnrUksFEe ฿0.60 ฿3053.19872
    17:18:34 z**m - ฿0.03 ฿3052.59872
    17:16:26 z**m - ฿1.48 ฿3052.56872
    17:08:34 4**m - ฿20.00 ฿3051.08872
    17:06:47 z**m - ฿20.00 ฿3031.08872
    17:05:21 h**m 1CXpH3xdKHHdTWtaVG3FLKWdmobSkuMf1N ฿647.00 ฿3006.08872
    17:05:21 1**3 1UiyrCuRHbcoyGNXGYSQs9bvxFbYmy4re ฿5.00 ฿3011.08872
    16:38:01 1**3 - ฿10.00 ฿2359.08872
    16:32:45 d**5 - ฿0.01 ฿2349.08872
    16:06:21 1**5 1EUQkB49EGf9B7kvW4awuTiJ9xcQZJppgq ฿0.10 ฿2349.07872
    15:55:51 x**m 1LTHZRC2oKizopskMXqe81Z6QZDjEuMWf2 ฿0.0017 ฿2348.97872
    15:12:17 1**m - ฿0.28 ฿2348.97702
    14:58:42 3**m - ฿0.01 ฿2348.69702
    14:52:08 2**m - ฿7.99 ฿2348.68702
    14:14:13 1**5 - ฿0.99 ฿2340.69702
    13:48:27 秀**3 16v7Be1LwnRZQhphbgF9VDNNG513nR8vUd ฿13.00 ฿2339.70702
    13:37:03 5**m - ฿0.01 ฿2326.70702
    13:30:04 2**m - ฿0.02 ฿2326.69702
    13:15:22 y**m - ฿1.00 ฿2326.67702
    13:09:07 1**4 - ฿0.05 ฿2325.67702
    13:08:01 c**m - ฿0.01 ฿2325.62702
    12:55:20 s**7 - ฿14.23 ฿2325.61702
    12:47:28 1**5 - ฿1.60 ฿2311.38702
    12:45:27 s**m 1JKXortBvsarBhWWFgBQb3mSrCaR3XVPe1 ฿0.036 ฿2309.78702
    12:14:32 1**5 - ฿0.03 ฿2309.75102
    12:06:58 s**m - ฿0.46 ฿2309.72102
    11:36:28 h**6 - ฿0.01 ฿2309.26102
    11:14:18 9**m - ฿0.01 ฿2309.25102
    10:39:57 纯**2 115dwEz5jiWv2cHKX7bbYhs8io3AcucVtv ฿3.00 ฿2309.24102
    10:05:32 8**m - ฿0.38 ฿2306.24102
    10:03:12 纯**2 - ฿0.04 ฿2305.86102
    09:44:08 1**m - ฿0.01 ฿2305.82102
    03:14:05 e**1 - ฿0.08 ฿2305.81102
    00:55:08 s**m - ฿0.01 ฿2305.73102
    00:53:02 s**m - ฿0.01 ฿2305.72102
    00:04:49 3**m - ฿20.00 ฿2305.71102
    23:44:01 3**m - ฿0.11 ฿2285.71102
    23:00:41 6**m - ฿7.73 ฿2285.60102
    22:21:11 g**m - ฿0.08 ฿2277.87102
    20:07:28 j**m - ฿20.00 ฿2277.79102
    19:54:56 1**5 - ฿5.00 ฿2257.79102
    18:34:05 y**w - ฿1.80 ฿2252.79102
    17:46:36 1**1 - ฿1.00 ฿2250.99102
    17:31:14 津**7 - ฿0.98 ฿2249.99102
    17:06:08 小**1 - ฿3.25 ฿2249.01102
    16:39:41 1**5 - ฿0.06 ฿2245.76102
    16:19:32 p**m - ฿0.02 ฿2245.70102
    15:55:14 1**9 - ฿0.01 ฿2245.68102
    15:31:41 1**1 - ฿0.02 ฿2245.67102
    15:17:51 7**m - ฿0.02 ฿2245.65102
    15:14:47 z**n - ฿32.00 ฿2245.63102
    15:05:00 1**m - ฿2.00 ฿2213.63102
    15:04:40 5**m - ฿0.07 ฿2211.63102
    14:24:33 5**m - ฿0.02 ฿2211.56102
    13:34:25 1**m - ฿0.01 ฿2211.54102
    13:30:00 f**8 - ฿0.02 ฿2211.53102
    13:16:43 津**7 - ฿0.01 ฿2211.51102
    12:59:52 h**6 - ฿0.01 ฿2211.50102
    12:41:30 q**m - ฿0.23 ฿2211.49102
    12:37:14 c**m 1PSe6Rq2yUFtmkigwceGK6z2u11rptcF2a ฿29.9999 ฿2211.26102
    11:43:14 n**m - ฿0.01 ฿2181.26112
    11:38:45 币**1 1289CEZw6Lkxje38YW6SmZDxm3EoTC78XK ฿0.113 ฿2181.25112
    11:37:10 3**m - ฿0.01 ฿2181.13812
    10:49:32 5**m - ฿1.77 ฿2181.12812
    10:38:59 1**8 - ฿0.01 ฿2179.35812
    10:33:55 x**m - ฿1.00 ฿2179.34812
    10:29:45 q**m 1E3V4zJMPyqN8RQ1PekjdcBqC44sRqpi76 ฿0.456 ฿2178.34812
    10:27:23 2**m - ฿0.02 ฿2177.89212
    09:27:15 h**6 1MPubbfrDMvmZC1rByNmxvEENQDyP1PAX ฿19.9999 ฿2177.87212
    09:10:45 w**m - ฿1.30 ฿2157.87222
    08:49:00 c**m - ฿0.16 ฿2156.57222
    20:36:21 1**m - ฿100.00 ฿2156.41222
    18:54:54 t**m - ฿20.21 ฿2056.41222
    17:27:09 1**8 - ฿1.09 ฿2036.20222
    16:30:47 z**m - ฿0.02 ฿2035.11222
    16:24:51 4**m - ฿2.69 ฿2035.09222
    16:05:39 1**m - ฿0.41 ฿2032.40222
    15:44:57 f**8 - ฿0.02 ฿2031.99222
    15:37:13 1**9 - ฿0.02 ฿2031.97222
    15:24:48 2**m - ฿0.02 ฿2031.95222
    15:06:53 d**5 - ฿0.01 ฿2031.93222
    14:59:57 9**m - ฿0.90 ฿2031.92222
    14:44:29 行**8 12xCwyLAfdTDuJFrrRSnvL9tUhjbEazW9e ฿4.00 ฿2031.02222
    14:43:14 t**m - ฿1.75 ฿2027.02222
    14:34:29 t**m 1PqrBEuYScqKWgT7e7yd9Z1h3feYbEW4th ฿0.8879 ฿2025.27222
    14:12:21 最**7 - ฿1.79 ฿2024.38432
    13:55:25 羡**7 - ฿0.01 ฿2022.59432
    12:01:52 q**m - ฿102.39 ฿2022.58432
    11:40:38 1**9 - ฿0.18 ฿1920.19432
    11:03:41 k**m - ฿10.00 ฿1920.01432
    11:02:59 9**m 1ixPp5Cr927MGV6hWiaY8Aiy5vQ8Zixmr ฿0.1949 ฿1910.01432
    11:01:29 9**m 1ixPp5Cr927MGV6hWiaY8Aiy5vQ8Zixmr ฿0.053 ฿1909.81942
    10:54:35 5**m - ฿0.01 ฿1909.76642
    10:52:29 3**m - ฿0.01 ฿1909.75642
    10:21:59 方**9 1DT8f7QMEVXKTuWsb3yQXWkV7dVKNWFEkV ฿9.39 ฿1909.74642
    10:05:22 j**m - ฿35.00 ฿1900.35642
    10:03:09 w**m - ฿0.01 ฿1865.35642
    08:18:59 虎**1 1DMzjHtf9xR5fqPQjw28hwvUEDWFa7tyiv ฿19.45 ฿1865.34642
    01:29:30 1**m - ฿8.99 ฿1845.89642
    01:16:34 1**m - ฿3.00 ฿1836.90642
    01:15:28 w**m 1MCBPtQWNYp5ov3jRZoGKMXxCY6adgivkr ฿0.50 ฿1832.90642
    01:15:28 z**m 18FE5EhsoB7rqXPAHPQjyVFANHpgzvp6f8 ฿1.00 ฿1833.90642
    00:24:00 f**m - ฿10.00 ฿1832.40642
    00:05:43 1**m - ฿0.03 ฿1822.40642
    00:05:04 1**m - ฿3.00 ฿1822.37642
    22:47:23 f**m - ฿43.50 ฿1819.37642
    22:22:59 f**8 - ฿0.01 ฿1775.87642
    22:12:28 t**m 1FHGBfNwywYF2Cq5Nwp7cEfqntwT1sjD57 ฿7.46652044 ฿1775.86642044
    21:36:02 s**t - ฿0.10 ฿1768.3999
    21:18:28 q**m 1DD2wHh4fDYHLNmWSeMobGw447URM8BRDX ฿1.05 ฿1768.2999
    20:29:58 k**m 1BPYWS2aQc5CUFNRPhJyx39bTwkjLxguup ฿10.00 ฿1767.2499
    17:56:58 1**m 17dqCk9XfRcKhoxo1BQnY9AxHUUYYixu7o ฿30.00 ฿1757.2499
    15:40:42 p**m - ฿24.06 ฿1727.2499
    15:31:33 1**9 - ฿23.89 ฿1703.1899
    15:13:20 2**m - ฿0.02 ฿1679.2999
    15:13:02 1**m - ฿0.20 ฿1679.2799
    14:46:22 洋**2 - ฿8.22 ฿1679.0799
    13:48:50 q**m - ฿0.18 ฿1670.8599
    13:02:12 3**m - ฿7.88 ฿1670.6799
    12:37:23 5**m - ฿16.00 ฿1662.7999
    12:17:02 3**m - ฿1.85 ฿1646.7999
    11:32:57 1**0 1Mtsx1uwauPoq1aZniuvW1Q5L6VucLFU7s ฿102.6546 ฿1644.9499
    10:48:57 s**m 1JKXortBvsarBhWWFgBQb3mSrCaR3XVPe1 ฿2.00 ฿1542.2953
    10:46:15 4**m - ฿9.99 ฿1540.2953
    10:34:32 1**m - ฿1.99 ฿1530.3053
    10:26:27 h**6 14F22JShdFbY2yoHa6M3w7W8vmMhYyzPKH ฿2.00 ฿1528.3153
    01:16:56 z**m - ฿20.00 ฿1526.3153
    23:55:12 洋**2 - ฿10.00 ฿1506.3153
    22:51:56 f**m - ฿1.00 ฿1496.3153
    22:00:56 w**m 13R9syyKd6hEYe4kC9DS4sCJ4r65vGE5Nj ฿1.00 ฿1495.3153
    21:26:24 j**9 - ฿1.00 ฿1494.3153
    21:10:04 c**m - ฿2.00 ฿1493.3153
    21:08:56 1**8 1C6ESVu2wGR6JvCf3TZ7irSgiEXzUmHK7t ฿0.011 ฿1490.9083
    21:08:56 币**1 1289CEZw6Lkxje38YW6SmZDxm3EoTC78XK ฿0.407 ฿1491.3153
    20:43:37 吉**4 - ฿1.00 ฿1490.8973
    19:53:41 1**8 - ฿0.23 ฿1489.8973
    19:49:56 7**m - ฿0.02 ฿1489.6673
    18:50:01 c**m - ฿0.10 ฿1489.6473
    17:12:20 苏**6 - ฿1.45 ฿1489.5473
    16:05:48 1**1 - ฿0.33 ฿1488.0973
    15:59:18 n**m 1F8SxuukneU7MaYn6UKkaPSAagpS6QBgPZ ฿1.00 ฿1487.7673
    15:27:50 红**5 - ฿10.00 ฿1486.7673
    15:12:17 4**m - ฿3.00 ฿1476.7673
    14:32:48 a**m - ฿0.02 ฿1473.7673
    13:43:00 上**2 1YcDWLnGnBzyrScSKmBRGDBn8j4Tqv7rX ฿4.95 ฿1473.7473
    13:42:26 1**1 - ฿0.10 ฿1468.7973
    13:37:00 2**m 1N47WfB7vvRsNgJVG82oX5kK1U59Qgnrmu ฿48.00 ฿1468.6973
    13:24:20 y**m - ฿1.00 ฿1420.6973
    13:17:04 d**5 - ฿9.49 ฿1419.6973
    13:16:51 2**1 - ฿0.10 ฿1410.2073
    13:13:28 上**2 1YcDWLnGnBzyrScSKmBRGDBn8j4Tqv7rX ฿0.05 ฿1409.0073
    13:13:28 风**3 1EQnLkTAH1Coa5H14kcYdnkVjNbRKsPrcF ฿0.10 ฿1409.1073
    13:13:28 6**m 14skKwe5NEqYBXF4LUVrt6RQVBRpxU29RU ฿1.00 ฿1410.1073
    13:07:38 1**8 - ฿2.07 ฿1408.9573
    12:29:42 f**m - ฿10.00 ฿1406.8873
    12:27:23 y**m - ฿0.05 ฿1396.8873
    12:20:28 2**m 1ZedUg4QF822Htn12iTnzvNvGnYmCC1Zp ฿20.299 ฿1396.8373
    12:13:06 g**2 - ฿10.00 ฿1376.5383
    12:05:13 b**w - ฿8.15 ฿1366.5383
    12:01:53 1**m - ฿0.44 ฿1358.3883
    11:52:38 q**m - ฿105.50 ฿1357.9483
    11:49:25 小**8 - ฿5.00 ฿1252.4483
    11:48:08 1**2 - ฿4.00 ฿1247.4483
    11:36:08 s**t - ฿0.10 ฿1243.4483
    11:34:56 1**0 - ฿0.50 ฿1243.3483
    11:27:26 n**m 1F8SxuukneU7MaYn6UKkaPSAagpS6QBgPZ ฿9.00 ฿1242.8483
    11:25:07 t**m - ฿9.00 ฿1233.8483
    11:17:29 c**m - ฿3.00 ฿1224.8483
    11:14:03 e**1 - ฿0.95 ฿1221.8483
    11:08:56 h**6 1MPubbfrDMvmZC1rByNmxvEENQDyP1PAX ฿9.9999 ฿1220.8983
    11:06:11 b**w - ฿5.00 ฿1210.8984
    11:04:11 1**9 - ฿0.09 ฿1205.8984
    10:53:46 4**m - ฿0.50 ฿1205.8084
    10:52:56 4**m - ฿72.00 ฿1205.3084
    10:51:31 9**m - ฿5.50 ฿1133.3084
    10:47:16 r**m - ฿0.02 ฿1127.8084
    10:46:29 羡**7 - ฿6.62 ฿1127.7884
    10:44:29 m**m - ฿0.32 ฿1121.1684
    10:40:54 卍**3 - ฿1.89 ฿1120.8484
    10:38:56 享**7 1Awc9aDvueUzDUFEp6B49EFrhmYuyxjPkC ฿0.01 ฿1118.9584
    10:35:08 3**m - ฿1.00 ฿1118.9484
    10:31:14 c**m - ฿0.11 ฿1117.9484
    10:26:06 p**m - ฿4.00 ฿1117.8384
    10:25:17 f**8 - ฿13.00 ฿1113.8384
    10:24:03 f**8 - ฿26.00 ฿1100.8384
    10:23:12 2**m - ฿44.43 ฿1074.8384
    10:22:16 4**m - ฿19.99 ฿1030.4084
    10:21:16 6**m - ฿2.50 ฿1010.4184
    10:13:31 3**m - ฿0.90 ฿1007.9184
    10:02:26 1**0 - ฿3.50 ฿1007.0184
    10:02:01 z**m - ฿30.00 ฿1003.5184
    10:01:01 1**0 1Mtsx1uwauPoq1aZniuvW1Q5L6VucLFU7s ฿100.00 ฿973.5184
    10:00:18 1**6 - ฿20.37 ฿873.5184
    09:58:40 h**6 - ฿1.97 ฿853.1484
    09:58:27 w**m - ฿3.26 ฿851.1784
    09:57:58 8**m - ฿0.01 ฿847.9184
    09:55:51 h**m - ฿122.96 ฿847.9084
    09:51:16 3**m - ฿0.10 ฿724.9484
    09:50:51 5**m - ฿12.13 ฿724.8484
    09:48:51 1**0 1Mtsx1uwauPoq1aZniuvW1Q5L6VucLFU7s ฿100.00 ฿703.95
    09:48:51 9**m 1ixPp5Cr927MGV6hWiaY8Aiy5vQ8Zixmr ฿5.0184 ฿708.9684
    09:48:51 m**m 1ATjBqkKLLZ4YWj6gjWG7eDVDGjLqt2RPr ฿3.75 ฿712.7184
    09:47:01 f**8 1K8WV9ZzXC7rLWUGutw5R7peZ37n3KKwDr ฿1.00 ฿588.95
    09:47:01 b**m 12aQWGJdc6H7orqZASuGmGq8tEMBUiyLDW ฿15.00 ฿603.95
    09:46:56 1**9 1NFrhRjASToxY7LoGS7TraeGNFXVV9cH8T ฿180.00 ฿585.96
    09:46:56 m**m 1ATjBqkKLLZ4YWj6gjWG7eDVDGjLqt2RPr ฿1.00 ฿586.96
    09:46:56 m**m 1ATjBqkKLLZ4YWj6gjWG7eDVDGjLqt2RPr ฿0.99 ฿587.95
    09:46:46 纯**2 115dwEz5jiWv2cHKX7bbYhs8io3AcucVtv ฿25.00 ฿405.96
    09:46:21 1**9 1NFrhRjASToxY7LoGS7TraeGNFXVV9cH8T ฿20.00 ฿325.26
    09:46:21 s**m 1GYKmiGGiSTMvY9NYm2nFMPzKSjCpwiCiM ฿30.00 ฿355.26
    09:46:21 t**m 1NYuAjVof7puXkGDwNiM9WL8bh4Enkj1kR ฿25.00 ฿380.26
    09:46:21 s**m 1HjFhzt1niVmL7WS7rCLZfACwJqrJa646S ฿0.70 ฿380.96
    09:44:06 x**m - ฿0.01 ฿305.26
    09:39:46 q**m - ฿200.00 ฿305.25
    09:39:21 q**m - ฿100.00 ฿105.25
    09:33:36 g**m - ฿4.49 ฿5.25
    09:32:46 1**m - ฿0.76 ฿0.76