A streak like this (7 blocks in a row by the same pool with 25% of the global hashrate) statistically happens on average every 500 hours.
So roughly every month.
Sorry for late reply.
So this is not withholding block finds and broadcasting the transactions one after the other?
509287 BTC.com 4 hours 1 minute ago 992.479 kB
509286 BTC.com 4 hours 5 minutes ago 975.617 kB
509285 Unknown 4 hours 17 minutes ago 989.775 kB
509284 BTC.com 4 hours 21 minutes ago 958.236 kB
509283 BTC.com 4 hours 26 minutes ago 973.774 kB
509283 BTC.com 4 hours 29 minutes ago 973.774 kB
509282 DiscusFish / F2Pool 4 hours 43 minutes ago 950.709 kB
509281 BTC.TOP 4 hours 58 minutes ago 955.183 kB
509280 BTC.com 5 hours 13 minutes ago 834.699 kB
509279 AntPool 5 hours 15 minutes ago 935.087 kB
509278 BTC.com 5 hours 19 minutes ago 0.241 kB
509277 BTC.com 5 hours 19 minutes ago 981.321 kB
509276 BTC.com 5 hours 29 minutes ago 986.026 kB
509275 BTC.com 5 hours 33 minutes ago 951.054 kB
509274 BTC.com 5 hours 53 minutes ago 965.622 kB
They seemed to scaleback to 22% for fewdays then back to 30% today for the jackpot rolls. This is beyond luck or chance.
https://statoshi.info/dashboard/db/blocks?from=1518674293323&to=1518679831784 BTC.com 46 30.87% ,<---gain %
AntPool 25 16.78% ,<---lost %
BTC.TOP 17 11.41% ,<---lost %
antpool lost hashrate..as did btc.top then we see the jackpot streak again.
https://statoshi.info/dashboard/db/mining?from=1518685211469&to=1518706811469and again
509309 BTC.com 1 hour 18 minutes ago 975.4 kB
509308 BTC.com 1 hour 23 minutes ago 975.8 kB
509307 BTC.com 1 hour 35 minutes ago 994.1 kB
and later...again.. x2 lots of 3 blocks... split apart by hash shufflers ...
509316 BTC.com 7 minutes ago 967.5 kB
509315 BTC.com 23 minutes ago 974.0 kB
509314 BTC.com 1 hour 1 minute ago 993.7 kB
509313 AntPool 1 hour 3 minutes ago 980.2 kB
509312 BTC.TOP 1 hour 13 minutes ago 967.0 kB
509311 AntPool 1 hour 23 minutes ago 918.1 kB
509310 AntPool 1 hour 27 minutes ago 982.4 kB
509309 BTC.com 1 hour 33 minutes ago 975.4 kB
509308 BTC.com 1 hour 38 minutes ago 975.8 kB
509307 BTC.com 1 hour 50 minutes ago 994.1 kB