I don’t even know that much about them but I can guarantee that when I see something posted by truscum communities, I’m like “I’m not touching that with a 50 ft pole”.
It seems a lot like they focus on what is a “real” trans person, which is very toxic, unless I’m misunderstanding truscum.
I don’t know if anyone was running intentional campaigns back then, but they were already well established some ten years ago when I slid into that pit and it most certainly is toxic.