There's some history re-writing going on here. The tweet from Medium about unblocking his account was in July 2018 - the author replied with 'Happens. No worries. Thanks for resolving the issue guys', so they clearly weren't too bothered about this at the time. They then went on to post over ten further articles on Medium over the next six months - again, hardly the sign of someone annoyed by the platform. (for contrast, they had only written one earlier article in the year, so his output increased after the issue)

...and now in July 2020, two years on, they have decided that this was the thing that stopped them using Medium? How is this anything but a lie?