I think only prime dice i can suggest to you that you can get bonuses depends in your level. you can get bonus up to 1 btc also you can get bonus rewards just be active and always update in their thread in games and rounds so that you can bonus if they held free bonus each member..
Yes they have a pretty nice website and its also easy to use if you ask me, the bonus is also very nice by the way.
The bonus rewards are easy to get and its also luck you need of course but its a pretty nice thing the bonus.