I've been cloned at least three times, and seen others. Same scam always--"thanks for your comment, join my club on Telegram." I'm sympathetic to Medium in that dealing with the spam bots is a literal game of whack-a-mole. I know how it is having managed Web sites for decades. Medium seems to be deleting the clone accounts within 24 hours, which is a reasonable response time, in my opinion. Medium has many problems but this is one of the few they seem to be dealing with responsibly. It's a regrettable reality that the more we put ourselves out into the public eye, the more open we are to attack.