The limited public figure angle I think is still hard to prove since the defamation came before Vic made any statement.
This is why the defense is citing rumor panels and such. They are trying say that there was controversy before the tweets, and Vic was involved in the controversy. Thus, he is at least a limited purpose public figure. I think it is probable that a judge will find him as such, but I wouldn't.
Does a high schooler who calls his friends together to denounce a rumor count as injecting himself (herself) into a controversy? I would say no. If a rumor response counts as injecting oneself into a controversy, then there is hardly anyone who is not a limited purpose public figure in any defamation case. The consequence of shutting up would actually increase the damages suffered by plaintiffs in these cases. So, it would not serve justice for the defendants either if the act of merely responding to rumor counts as interjecting into a controversy.
Vic has fans, but would anyone who has a following in a niche community be a public figure then? If you are popular at your local bowling alley or happen to be a minor league baseball player or if you are an actor at your local community theater, are you a public figure? I am not so sure this is the way the law was meant to be used. I think it requires the ability to affect public policy, which Vic cannot do in any meaningful way otder than as a private citizen.
All in all, it seems like a bunch of attention hungry artist formed a mean girls (guys - soybois) clique, and there was a good looking guy who was popular and had all eyes on him. They wanted what he had, and they were jealous. So, in order to bring him down to their level, they spotted every flaw. They would talk about something negative about him in their circles to feel better. This became rumor. Rumor became gospel truth to them. Then, when they reconstruct their memories, they incorporate their now totally true rumors into their memories. Vic was always like that to them not even realizing that Vic became that only in their minds after the fact. I hypothesize this is the reason why some don't report assaults; at the time it wasn't. It became one later after the fact.
This reminds me of high school so much. My GF and I watched 10 Things I Hate about You recently. What they are doing is very much like how Heath Ledger's character got his reputation. Rumor... The truth was very different than the rumor - and frankly less interesting. Generally, people learn not to put too much faith in rumors when they become adults. Imagine being in your 40s and 50s with the maturity level of a high schooler. For the defendants, they don't have to imagine.
We all have to take responsibility for our decisions. And while my heart breaks for victims of assault, they must also take responsibility for their actions and decisions when they chose NOT to report the assault when (or very near) it happened. One of the consequences is that someone guilty might get away with what they did to you. Another is that people won't believe you. Being an adult is not easy. Very rarely are we given a choice between something completely good and something completely evil. Most of the time it is varying degrees of shitty. But, you chose the path that you did.
Defendants need to take responsibility for their own actions in destroying Vic's life. Even if part of what they say is true, and Vic himself knows he has character flaws, he doesn't deserve what happened, and frankly, defendants don't deserve what they are doing to themselves. Vic is more popular than ever right now. His fans are going to hear his name and support him in whatever he does. The worst case for Vic is that it is a little harder to get some jobs. Defendants don't realize they already lost the war. There has not been any allegation that will make his supporters turn from him. Defendants are the only ones who stand to lose something at this point. Even if they get the GFM, it doesn't really hurt Vic. Being self-righteous isn't going to serve your best interest. The KickVic people will still think he is guilty - regardless of the outcome, and the IShandWithVic people will still be on Vic's side. A judge's ruling isn't going to change the way people think. But, it might change the employee status of VAs. It might cost the defense a lot more than they imagine. It might tarnish their credibility more. It might cost them fans as they learn more about them. What does Vic care? You're trying to kick him out of the community. If it burns as he leaves, well... What does he lose? So why bother? This is why Nick says that he already got what he wanted for Vic. I agree. Somehow, I doubt petty mean girls and soybois will suddenly mature into functioning adults.