I was given a blue checkmark by pre-Musk Twitter because of the cryptocurrency scams. It was taken away in the early days of Musk Twitter when verification meant “anyone with $8.” Ironically, it was forced back against my will and without my paying for it, because Musk was embarrassed that larger accounts didn’t have checks. Obviously it didn’t serve any useful anti-impersonation purposes at that point, but I got free “Grok” I guess?