It's so hard to tell what he actually believes, but yes, I do think he has some sort of expectation that Twitch and/or Youtube can be a free money printer if he just jumps through the right hoops. He hasn't beat the drum for Twitch monetization lately but he used to talk about how nice it would be if he could get some money from it and make a living if he got enough subs to become a partner.
I do wonder how much of this is a LARP for Mom though, implicitly or explicitly. Like, he's never a NEET, just a struggling game designer, struggling journalist, struggling streamer. You wouldn't want to kick him off of the bottom rung of the ladder that he's totally on and totally climbing, right?