Well the 2nd paragraph stated does well imply enough what they do in a way "scam" big winners out of their winnings through limited hotwallet amounts.
Okay perhaps I shall repost and find it in the Reputations section? If there is one.
Did someone got scammed because of that empty hot wallet? If none, then you can't say bitvest scammed their player. It's player decision to wait a little until hot wallet refilled or they can gamble it again. I also think this is more appropriate on reputation section since no one has got scammed.