It’s going to be a lot harder to pull off massive protests.
I quit as the top mod of /r/StarTrek in 2021 in protest against Reddit's platforming of vaccine disinformation subreddits. Then in 2023 during the API protest, myself and several of the remaining mods (including mods from /r/Risa and /r/DaystromInstitute) started StarTrek.website.
The consensus I've seen on Lemmy has been largely "we don't need to spread the word about our open platforms because Reddit will do something stupid again and there will be another protest and Lemmy will be promoted there". So I hope we can take this as a lesson that we can't rely on platforms being shitty in order to switch society over to open standards. We need to do our best to make Lemmy/Mbin/Piefed good as well as known.
I can see that there might be a need to ensure some consultation in a sub, such as a notice period. Especially so for users that might wish to delete their post and comment history before a sub goes NSFW or private, but this is just another step.
As if being an early adopter in selling all their content to train LLMs wasn’t enough to justify avoiding the place.