How about an “add sats” feature to introduce a queuing system to the broadcast of notes? This feature could be switched on by Nostr clients when high traffic volumes are detected.
In turn, the split of sats revenue could also involve the client taking a cut for facilitating the payment.
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Penny Problem Gap: Economists assume demand is linear, but people’s behavior totally changes once an action costs money. If the inventors of the Internet had known about it, spam wouldn’t be such a problem. If sending an email cost you $0.001, there’d be way less spam.