This is a old rule here:
2.03
In order for our website not to be used as a storage facility, we shall impose a 5% fee on deposits that are withdrawn without being used for sporstbetting and casino. Proven Anonibet customers are excluded from this condition.
Well, I've placed plenty of bets, so I think I count as a proven customer. And I was never presented with this explanation or the option to pay the fee. I was given some rigamarole about the deposit bonus being the reason for why I couldn't withdraw. And info@anonibet is even posting that I should have been able to cancel the bonus and withdraw. So this doesn't make me feel any less sketched out by this experience.
EDIT: info@anonibet, please PM me for my account details if you're interested