This is his MO, I used to watch his show (I was a teenager, sue me, it was almost 20 years ago now.) and his basic tactic is to find someone people know, hang around them for a while, and then fuck them over when he realizes that he's becoming unbearable. It's like leap-frogging but instead of making friends he leap-frogs to his next victim. and every time he does he gets a bunch of attention from a new audience, as is happening now. The attention doesn't need to be positive, he just needs it.
As an example of this, one of the first bits he would do on his show back in 2007 was called "the bad podcast of the week", in which he would simply pick the podcast with the most viewers (they were all consolidated on a single platform back then) and simply tear into them until they were forced to respond on their own show, thus getting him attention. That's all he's doing with Nick, and nick is a fucking retard for not seeing it. Melton is incapable of having friends, it's just now how his brain works.