Profile: b5015d1c...
This is something that Scuttlebutt does much better.
Related: the fact that nostr doesn't have a blockchain-like structure anywhere in it means you have no idea what you are missing. Ugh.
It scales just fine because transactions that aren't going to be mined in a reasonable amount of time don't need to get into the mempool at all. This is precisely why there is a mempool size limit, along with code that automatically adjusts the minimum relay fee based on what transactions got ejected due to that size limit.
If they're sharing nyms, why bother having multiple nyms in the first place?