This is a good point and given previous precedent upon there being no guilty party, the responsibility would lie on both parties for re-payment; however, you have already been refunded 53M.
With this in mind, how much would a proper refund (placing half the guilt on both parties) be?
@Azie @Yankiee thoughts on the above?
Edit: Keep in mind, I am brain-storming solutions. Precedent may involve two individuals coming to an agreement, but this may not apply to your situation providing you admitted to botting on your IP and there is no proof Bulletproof botted at all. Alongside this, one account is permed and one was only temporarily banned. My comment is in no way binding; rather, (again), just brainstorming solutions.