I have passed on the information about the Bitcoin withdrawal fees. As for promotions and contests, what kind of contests would you like to see?
I'm not aware of each promotion of wolf.bet as I'm not a regular gambler there. Wolf.bet has enough bonuses for it's VIP users. But I think you guys should add the monthly bonus to make the perfect combination of the VIP loyalty rewards. BTW, Wolf.bet should have kept the '7-day streak reward' for it's user. There is aslo a lack of promotions for the sports betting.
But at least, you are now here on their thread. You can try back reading or check the first page to have an idea if what are the promos they have. You said you are not a regular gambler here but that can also mean that you still gamble here on rare occasions.
What could be the possible reason for that? Maybe you find them unappealing before but look at how they evolve. They now have new games and then there are now sports betting but maybe the monthly bonus is still missing and that is the one that you are looking for? Well, let us see if they will also consider this but if ever they do, then this could surely help them to gain more players.