This is probably where we're headed. The only interoperable thing between it all is the notes and the zaps.
Discussion
With everything on Nostr being an event, anything you do carries equal weight with this approach to rate limiting. So it comes down to which activities you find are most valuable. A like and a reply and a zap are each events. Hitting 5 likes per minute (not unreasonable) would prevent you from doing anything else ever on the Damus relay. Lol