This goes beyond just spam though. I'm almost definitely not going to get any value from someone who can't or won't spend whatever small sat amount is required to interact with me. I don't even necessarily need to get the sats if there's some technical way to give it to my relays instead. I'd prefer to make it optional though if possible. I just don't really need to see shit from low value npubs. And if I do see them there should at least be a cost for it if they're being sinister like spammers. The free for all model clearly isn't cutting it regardless.