Don't get it. Why would any hacker steal coins and leave them sat in the same account for months, just to hand them back for a percentage of the stolen coin? In those months, those stolen coins could have been sent through numerous addresses, coin mixers, exchanged etc.. making it very difficult to trace. Smells like a scam to hide a scam.
Wish I could answer that myself. At this point were not holding our breath on this, but it was presented to us in a somewhat believable way
so Paul decided to give the guy a chance to prove himself.
So far nothing