Yeah true, LN Over Square would be the smoothest path for merchants that don't even need to know if its bitcoin as long as it saves them on fees

piecover

bitcoin

What is the best lightning business idea that nobody else is doing?

I go to a lot of craft shows and community markets.

These places are so ripe for using bitcoin over lightning.

Everyone's got the "Square" payment hardware which, somehow knows your email address for sending receipts.

A single QR code connected to a wallet or other app that can integrate with transmitting receipts back, perhaps with a time limit on the KYC info, would be a good substitute.