The thing with this cheaters and scammers is unappaling and thank goodness for revolution such that there would a confirmation requests on the end point of the user, that way they will be able to confirm the transactions and of a truth some casinos we're victimized in the process but about the loss case I can't really specify if any was reported but sure there would be due to the high double exploitation.
I do not think there is anyone who was able to scam the gambling site as there must required confirmation whether that is before credited or any phase of the transaction eg: before withdraw the transaction must have to be confirmed and usually gambling site doiesn't allow another deposit before the confirmation of the previous deposit.