I deposited 100 dollars, got a 100 dollar bonus, played slots, hit a win on a freespin feature, finished the playthrough on the same and one other slot machine, cashed out 750 dollars. Then my cashout was denied, deposit returned to Click2pay and after several emails asking for clarification I got the following:
As stated in our Terms and Conditions, your bonuses are subject to review for irregular playing patterns. To ensure fair gaming and the proper use of bonuses, we consider low margin betting, equal betting, zero risk bets or hedge betting to be irregular gaming when deployed to exploit bonuses.
You may refer to this link; http://www.grandduke.com/terms-and-conditions under “Bonuses, Comps, and Promotions” for additional information.
So apparently they have additional bonus terms hidden in the general terms. I read those. And I found them to be self-contradictory. They first say that the following is not allowed:
Wagering based on one specific slot machine, in order to significantly increase a bankroll, in relevance to the initial betting amount, and then switching to another game.
and then they go on by saying
In order to be eligible for withdrawal, you must have winnings from multiple games, in which winnings from any single game cannot exceed 50% of the total amount of the withdrawal request
So after one hits a win he cannot switch to another game. But he has to win a comparable amount in another game. This is impossible. According to those terms no slot player can cash out after redeeming a bonus and winning.