Gavin looks so enthusiastic when he is talking about Craig maybe he doesn't believe himself that Craig is a scammer but people are so gullible nowadays. At least Gavin admitted that only time will tell whether he is wrong or right so I think we need to lay our pitchforks for a while and wait for the story to unfold further.
Gavin is much smarter than that, so he has either lost his fuckin' mind or he's now part of some nefarious activity. I see no other options except them two.