The Electronic Frontier Foundation does a lot of amazing work to defend privacy and digital freedom. Just to throw one example out there, they released firmware for a low cost hotspot to detect cell snooping via IMSI catchers/stingrays.

Because they’re an advocacy group I suspect they stayed on the platform for visibility. I can half excuse orgs who crosspost to various platforms as long as they aren’t only on Twitter. But individuals do not get the same pass.