There are a lot of leftists still “fighting the good fight” on Xitter, even if the platform is pitted against them and all they do is drive engagement to it. I never understood why some people can’t bring themselves to leave. I left reddit for much less.
I get that, but at this point I’d actively try to get them to use a different site/app. I managed to move large parts of my friend group and my whole family to Signal. I’m now trying to get some to transition from Discord to Matrix, though moving there has definitely been not as smooth.
It should be much easier with Twitter, there are a bunch of very similar and usable alternatives. You just have to put in some work and convince people with solid arguments and support.