It can be other products too. I'd prefer it to be food. Nostr Farm Connection. If there's a shop and you can drive users to check it out, the farmers will be happy to pay for the service. 

There are many buylocal and prepper folks here too. They like tools like stoves. All that's needed to get sales is a good story. Just need to be genuine and not appear like a total capitalist 😀 You're already writing stories to promote Nostr, so no shame to get more money than zaps.