Summing up, the race is probably rigged with Bitsler fake accounts. I did not even complained to admins because it would not solve anything. From that day on I just stopped depositing into Bitsler.
Be careful!
There is really no need for bitsler to keep wagering to win something, I mean they are getting all the money anyway and the small amount of daily wagering they would give out is nothing compared to how much is wagered. However if it will make you feel better, in almost all the wagering contests I have seen ever, last minutes are the important part, I have seen things where people wagered for a whole month and on the last 1 hour someone else just came in and wagered a ton and won.
It is not about who is leading up until the end, it is about who finishes first when the bell rings and many rich people know this and in order to avoid wagering too much they allow others to wager until last hour and came in to destroy all your hopes at the last second to take the win.