This could be the death of centralised marketplaces…. Every eBay listing for example: here is a permissionless mechanism outside of eBay’s control for direct communication between buyer and seller. The only thing they have in common is a shared interest in the listed item… interesting game theory there 

 yes nostr kills most centralized web things 

 Please make it so. I was thinking about renting a car on Turo last night and there is no way to contact the owner to ask questions. Their solution is you need to book it and then you can ask your questions. Only in the FIAT realm does that make sense.