I couldn't tell 100% if he was "in" on the scam or not - has he really never thought of why they tell him to go to distant restaurants, never returning, and why

I couldn't tell 100% if he was "in" on the scam or not - has he really never thought of why they tell him to go to distant restaurants, never returning, and why the card is always declined multiple times, and why the cash back is THAT HIGH? He did give me a referral as if he was trying to sell this idea but I didn't get very far in their signup (first question: my full name. pulled the plug there) and he introduced this topic as if he was "working" on this "technology" that I had to ask a dozen questions to pry open before he even got us introduced to his "credit card" (either he was really working on it and wanted to keep it secret from us actual techies, or knew something was sketchy and didn't want people to know he was doing shady stuff, or he genuinely thinks he is beta testing some legit technology and getting rewarded for it but didn't want to immediately go into detail) But if he isn't in on the scam and does pay off his card, funny enough, that must mean all of his money is going directly to the crime ring. Two birds with one stone!