Well, I'm not sure about pynostr since Python is a toxic snake that bites its own tail but as far as avoiding spamming requests to the relays goes, maybe your bot should use a more subtle approach like sending polite messages with jests and puns or bribing the relay operators with virtual beers. Just remember not to slip any kyber crystals in there unless you want to be reported.

Oops forgot the ‘@‘ for the npub #[1]

Are you using it because you’re on windows? I’ve been using its originator python-nostr