The idea is to minimize your risk involved with bets and bet on extremely safe options that have low odds, 1.003 -1.02. The likelihood of you winning is high and you get the rakebacks involved.
Wait, you are getting rakeback from bets that win +99% of the time?
1.003 decimal odds is like ~99.70% win probability
Rollbit can't be this stupid, right? There has to be minimum odds requirement for rakeback.
Quoting for image view. I've also send a PM to Rollbit Razer notifying him about this issue. Let's wait him to be back online and see if he has an insight for this matter. But if I may give my amateur opinion based on your strategy quoted below, this seems like a value bet. I am not sure if rollbit explicitly forbid this and if it's specifically written on their ToS, but the general consensus applied by bookies is that it is see as something that's frowned upon.
He risked 1000$ to win 3$, one of the dumbest bets I have ever seen. But even a 1% rakeback would make it +EV.
I don't understand why this should be a problem for the customer and not the rollbit company? Does abuse of rakeback give a reason to confiscate all the money from the balance? In this case, you can find any reason and take the money. Instead of improving their rakeback system. This is a blatant fraud on the part of the company, but they are famous for this and I'm not surprised