Rollbit confiscated my balance of $410 out of the blue yesterday.

See here: https://bitcointalk.org/index.php?topic=5458053.msg62480562#msg62480562

Be careful with Rollbit, they can and will confiscate any amount you have on your balance. They can call everything simply "sportsbook abuse" and will not go into further details.
I strongly advice to not bet in the future with Rollbit and choose other sportsbooks instead!