Why would leaked OF pics be revenge porn and not just a copyright violation that could be DMCA'd or something? They are images she is selling and distributing online, revenge pron is normally given to a single person with the expectation it's only for that person.
This.
I remember Tila tequila (everyone's favorite Nazi and MySpace friend) tried to sue an ex over over a leaking their sex video under the clause of invasion of privacy, the judge stuck her down as she promoted and exploited "sex videos and sexuality."
In this case, I think it'd be the same. She actively promotes her OnlyFans. These are images SHE published. So it wouldn't be revenge porn, but rather just copyright laws. If there was any kind of legal action, it'll probably start with a cease and desist.