@sbird there is a bot i use with discord which has many such games, you can self host the bot but it works with discord. Not a 100% self-hosted solution but you may find it useful.https://docs.discord.red/
The platform I use currently (hubzilla) has support for shops, but it works through its own zot protocol, but I feel this can be extended to activitupub. It is federated currently but only on the networks that support openwebauth. Maybe the technical minded would know better about this.
you might want to choose from a hub that runs latest hubzilla and is open to public from here #[https://hubzilla.fediverse.observer/list](https://hubzilla.fediverse.observer/list), #https://hubzilla.org/pubsites
i see. there are other friendica successors (hubzilla, forte, streams) which have forum support. Like hubzilla has support for forums [e.g. #^https://hubzilla.org/channel/adminsforum] which is what you are looking for.
Another i admire with frindica and its family (hubzilla is mine) is how they implemented groups, if i make a post on a group it doesnt get delivered to every one of my connection, it only goes to the community and people in it. On the other hand i can make a post on lemmy using my hubzilla account but it will show up in every one of my followers timeline since it is by default a public post.
Everyone has already recommended friendica, but there is also hubzilla which is a fork of friendica and has much more. Its relatively unknown but very powerful, also there is this family of platforms that are for smaller communities for facebook alternative, friendica, hubzilla, streams, forte. You might want to give these a try, friendica is the oldest but others have evolved and have better ui/features and superb privacy controls.
The best use case for RSS for me is getting updates from journals and github releases. Also subscribing to youtube channels feeds is convenient since i dont have to visit their website regularly and can just watch the channels that im interested in.
One thing i've found particularly impressive is how hubzilla has implemented forums, which doesn't make all your posting history public when posting to a public forum, the post only gets shared among people who are part of the forum.When it comes to respecting privacy hubzilla wins hands down!
@sbird there is a bot i use with discord which has many such games, you can self host the bot but it works with discord. Not a 100% self-hosted solution but you may find it useful.https://docs.discord.red/
and for games https://index.discord.red/