I am not going to argue against them because they are literally going to give away 365 thousand dollars per year, that is more than most places give out in their life time, hell most places have marketing in the sense of "if you can win it, you take the reward, if you can't it is free marketing for us" type of stuff, like jackpots are jackpot for a reason, it stays in their account for so long that dudes could even make money from interest rates by the time the reward is requested (at which time they will say it is on cold wallet and withdraw from the interest and then pay you) so long story short wolf.bet is much better than almost 99.99% of places when it comes to giving away... but not a single promotion on Christmas does look really bad.
We don't know if the gamblers will win money or lose more than 1 bitcoin and that is a risk that wolf.bet would have to take in that situation. However if gamblers lose more than they win, that could be both a profit for wolf.bet AND a great marketing.