The ones who are most vulnerable to this change are the ones who especially should've left this platform already. I'm sorry, but they're not being forced to use it, and everyone should leave it. I don't have much sympathy or care about wanting to make an alt-right social media platform safer, I want it to crash and burn.
A lot of them are in-denial. I've seen them argue that Twitter isn't a Nazi platform and is used by normal people. Serves them right I guess, they were told it was a problem and they didn't want to listen.
The best way to cure network effect is with pain and suffering, and eventual forced deprivation (when the service shuts down).