Look I don’t want to be combative here, and my sincere apologies if this response comes off that way but here goes
IMHO this is already the way activitypub works. Platforms that choose to federate, are able to pool their posts and the like. And yes instances can make money off of content posted on other instances. That’s not a bug it’s a feature.
On the other hand, meta sucks and I’m not sure if I’d really want to federate with them either. So like, idk lol, just spitballing