GitHub did this to me a few years ago. I still feel violated. Not by my idiot former employer. I feel violated by GitHub. I got my account back. Sort of. They detached a significant amount of my content from my account, and returned to me a gimpy lobotomized version of myself.
All my old GitHub comments are credited to “ghost” now. I was somewhere in the first 12,000 GitHub accounts.
My relationship with GitHub significantly predated my dalliance with this one employer years ago. I trusted GitHub. My GitHub account was a formative part of my identity. I still can’t believe it and I still can’t forgive them. I lost some of my sparkle that day.