Its not for bitcoin, its for p2p online shopping, like eBay but without the fees and without the fiat network. Bitcoin lightning could be used for a service like robosats to provide this, and I know there are websites that offer this esgrow. Separate from escrow, a commerce credit score could be integrated with nostr marketplace and then its all-in-one. A vendor could provide escrow services via nostr marketplace for vendors with little reputation. Peer-to-peer e-commerce payments need some kind of bootstrap to provide assurances so the least friction and best experience is possible.