Blackjack.fun can change the rules and make it customer/player friendly to attract players
or
players can stop playing until they implement new customer friendly bonus rules
Actually all casino do this and have a small print in every ToS. This is to guarantee fairness in case someone abuse their promotion while their ToS doesn’t cover it. This is always a case to case basis so I mean changing rules in general is good nor bad. It depends on the changes they made.
But their bonus in general has a high wagering requirements unlike before when they are still new with full casino feature.
It’s true that they remove probably fair logo on the bottom page of their website BUT they put a probably fair tab which user can verify bets on their house blackjack. This is much better than before and this improves fairness of their house game