Ok granted, that may be true. I wouldn’t be able to tell as I left in June '23 and never looked back. But from what I read about the protests back then, I seem to remember that only few subs had to have their mod team replaced by Reddit. I think if more mod teams of big subs had been willing to call it quits as a team, the disruption could have been bigger.
In the end though, I don’t know if any form of protest can be effective in this kind of situation as Reddit holds all the cards, and if they are dead set on enshittifying, nothing will stop them. What mods and users should do is just walk out.
Lichess.org is the best website to play and study chess on, hands down, and it’s entirely Libre/FOSS, with zero ads or trackers (e. g. read here: https://lichess.org/about).