Buttondown on Nostr: Trying to think of interesting use cases for a toy/reference ActivityPub ...

Trying to think of interesting use cases for a toy/reference ActivityPub implementation, ideally of the shape:

1. Public data
2. Multi-faceted (ie there would be different channels/authors/etc that someone could subscribe to)
3. Dynamic, and changes at least once a day.

Please help us think of something more exciting than "stock data". Stock data is boring.