I'm already out of there (just receiving a bit from referrals), so I can write you what I noticed. There is almost no one playing there except organizer's bots (it is not accusation, just my opinion

). They bet both up and down of course, but in the way that the ratio up amount/down amount is the same as the ratio of users bets up/down. It should be clear that this way it doesn't have any effect on users (0.001 up, 0.002 is exactly the same for users as 0.012 up, 0.024 down), just making impression that there are more people. But what happen if there is only one side bet from users? Then the ratio is huge and after 5 wins and 1 lose user loses.
Conclusion: bet when there is someone playing, then you can win. You can even sometimes lure players bet side you want (by manipulating the ratio at the beginning [bots will induce ratio similar to yours even during the betting time] and change it at the end). Manipulating price at Poloniex when it is possible is also helpful (but not neccessary).
My usual strategy was: wait for someone, wait for bet when you think the chance up/down is 50/50, bet both sides 0.001. If someone bet one side 0.001, then the ratio is 2:1. The chance is 50:50 so if you lose one time and win one time in this case you win 0,000375.
I sometimes played 2:1 when I thought the chance up is 66% and my expected value was also positive (but it is harder).
Summarizing, I maked some profit, but it costed me too much time to wait for some good opponent (some players are online, but play only when the propability of up/down is higher then 80% - it was hard for my to deal with them). I prefer to trade altcoins than spending time there now.
Still some users are not aware of how it works (1 month ago it was easier to realize it, now there are some "distractions", but general rule is the same).
If you think you can try it (I don't want to encourage or discourage you) and what I write is useful then you may use my link
https://btcbet.cc/r/iWUcbG/ to register.
Anyway have fun, don't take it too serious (as I did). Good luck!
, so we will know if user player or not. With BTCBET.cc Bots, it seem like we play with BTCBET.CC only, and BTCBET.CC take profit from user when one user play.