You counted a bet from before the joining, that's not right.
I don't think I can finish 100 bets though, so whatever.
We normally count all bets from the start of the competition, unless we think that users were trying to abuse the system. Like winning at big odds and then registering that address to the competition.
We do this because we add players to the leaderboard manually, so with this system we allow users to be betting already before they are added to the leaderbaord.
As for the 100 bet limit, users normally can make that number of bets. What some users choose to do, is to bet 5% of their current bankroll on the bets they think they will win, and bet just 1% at low odds just to "fill in" some bets and reach the 100 bet limit.
