I've been playing at Buck&Butler over six months with and without bonuses. On 7.2.2015 I deposited 100€ and didn't receive any bonuses. So I played completely with my own money, raised my balance up to 588€ and requested a withdrawal. A few days later I logged in to my account only to find out that my winnings had been confiscated and only my 100€ deposit was returned. Live chat told me this happened because I had broken their max bet rule playing with their previous bonuses.
It's true that I have broken their max bet rule previously. Still it's absurd to confiscate my winnings due to previous deposits especially when I haven't managed to make a withdrawal even once when playing with bonuses.