Actually, several people (myself included) posted in the comments of his first video before he invested money in Bitpetite that it was clearly a ponnzi scheme. There have been several other sites just like bitpetite the last 1-3 months that pay 5% or more daily interest. That should be the first red flag. Also, these companies always appear to be based in the UK, and no one ever knows who runs them. A little more research would have made it very clear that Bitpetite wasn't legit. That being said, I do think it was an honest mistake on Joe's part, and he did refund the 10% commission he made on the people that signed on using his referral link. So, kuddos to him for that.
Also, it was just over 1 million dollars invested using Joe's affiliate link. I happened to see this right before Bitpetite went down. Who knows how many also invested based on his video and didn't use his link so they weren't even counted. So Joe could have made over 100k in referrals. I never heard him say how much of that he was able to get off the site before it went down.