The rat/snitch thing is merely a way to sum up all that is obvious about the guy.I agree that Ali is shady, as are numerous people he's connected to, but that, in a way, is why he's perfect for dealing with people like Dana White or Ari Emmanuel. He's mostly bungled his way into everything, it seems. I don't quite agree that being a rat is so cut and dried because I definitely know of people who were made offers they couldn't refuse. There's plenty of other things to critique Ali about like WSOF, as you mention, his lone MMA fight, his mouth, etc. Conor is the one who got the snitch/rat thing going in the Khabib drama and little he says is worth repeating because he's a moron too.
He is definitely a guy that will flip on something/someone for a better personal outcome.