Switching cost being 0 is probably a detractor for anyone thinking of building a startup on nostr. You do all the work and someone clones you and vibes a better version over night. Not exactly a selli...
I think of it more like .. use nostr to clone a popular app for a specific community... Ie. Facebook marketplace clone serving two local farmers markets. Low lift. useful,keeps money, attention in community. Anchor links from nostr on encumbant platforms for distribution. Great way to introduce BTC based payment rails....