I don't have Kofi or any sort of tipping. I'm happy just to have people read what I write. After reading that a writer got some incredible number of referrals through adding that link I thought I'd give it a try. I thought it would be a waste of time because 96-97% of my readers are already Medium members. But anyway I picked up 5 new members at $2.27 each! I don't know who they were or I would thank them!