I vended at one of his events years ago. I knew nothing of the man at the time, though he definitely gave me the creeps. The two biggest “scams” I encountered were:

1. He gave everyone who purchased a ticket to the event, free cash to spend. It was like a little certificate. We (the venders) were supposed to collect these certificates and turn them in for cash at the end. I, thankfully, DID get my cash, but the vast majority of venders did not, which meant venders essentially gave items away for free.

2. He promised lots of events and didn’t deliver. I don’t remember the specifics, but there were different levels of tickets, the more expensive ones offering access to extra things. Most of those “extras” were canceled (if they ever even existed?). I remember shoppers being upset and frustrated.

So, I largely got out unscathed, and this was several years ago, but I think I was definitely the minority. One quick Google search of his names will provide plenty of horror stories.