Bloodsuckers and bloodsuckers 2 are super low variance, high rtp games. Only reason I can think of they are normally banned. Beautiful bones has a progression feature where you collect skulls to trigger the bonus. These types of games are often excluded from bonuses. Regarding casinos stopping bets over their max when using a bonus, I know Dunder definatley does this which is under the MT Secure umbrella along with Calzone, Metal, etc so I would of though these would aswell