you seem to be a threat to them you only deposited less than $100 worth of ETH and you have made it to $500, that is 5x you could be draining all their funds in no time if they still allow you to play. i'd like to copy bet.
it is unfair though that they take your winnings since you won all those before the change of terms and conditions. they have decided though, nothing else can be done but maybe the AG can do something for you.