@kajkandler This is a really good question because ActivityPub is similar to RSS with two really important differences. 1) ActivityPub is two way. While RSS broadcasts content it does not have a way to know if someone liked, boosted or commented on that content. 2) RSS forms a connection between a blog and an RSS app. ActivityPub forms a follow connection between an account and another account. This means if you move from one reader app to another the connection is maintained.