@Blort @marsxyz Open Collective is also totally FLOSS and the dev's told me anyone is welcome to host their own but the code hasn't quite been set up for other people yet. But that their whole project is 100% open source. They also said they would be totally down for ActivityPub support but that they don't have the resources to implement it themselves but if someone else had the energy to do so they wold be on board!
@marsxyz It's a #selfhosted crowdfunding page solution similar to a #Kickstarter page. Sadly it doesn't use #activitypub or anything fancy like that for comments etc, but I added it as an example of a self hosted alternative to the #crowdfunding portals. #Liberapay may be more equivalent to #Patreon, but I don't think (?...) you can host that yourself.