Originally Posted by KrisKross

If you don't want to use CB Stats, you have to be comfortable manipulating the data on your own. The most basic way would be sort the CSV by user and then look for users who had spent for a long time and then suddenly stopped spending.

You don't know for sure that they've been stolen, though. You used to be able to send a list of users to CB who you thought may have been stolen and then they would investigate and return any commissions from that user. But they stopped doing that.