That will always be true regardless of strick policies, 2 events from one npub in one minute it's the same as 2 events from 2 npubs in one minute. Same space in same time. If this trend continues a user with a 4/5 relay list may have some events only accepted in 1 or 2, and people will have to connect to a lot more relays to try to get their events spread.  

 I agree, this sort of limitation is an over-correction and will only encourage even shittier behavior. I think people miss the fact that you can spam many Nostr "accounts" per second.

You are welcome to use my relay for your app btw, it does not suffer from such limits: wss://n.ok0.org