The problem has been that people conflated it with the service Aaron created as a reference implementation, which implemented IndieAuth for people who didn’t have it by using the OAuth services of sites like Twitter and Github to bootstrap the service.
Aaron succeeds here in finally conveying a point it took me a long time to understand, and partially only by reading and implementing one of these.
Was pleased to see the founder of Home Assistant, a product I use, tweeting that he would adopt this in that product. Looking forward to seeing what people come up with.