That's a wonderful measure to take!
While I agree that antifraud measures important I feel as though that could be avoided through different measures.
Perhaps a probationary period for the first week/two weeks of payments accepted on newly uploaded games/submissions? Or even just a set amount of sales per new game could be monitored?
Once it checks out as legitimate, payment could be made instant
Should something slip through, the seller should and could be held responsible via PayPal, independently.
Just my 2 cents! :)