At one point I was working on a POS proof of concept that would offer the software for free to restaurants to use with the caveat that we could sell their anonymized patron data as reports to restaurateurs looking to gather intel on viability of new restaurant locations. I got bored of it and stopped before I validated the market for it, but I think there is space for this. This was before vendors like square had their products for small businesses, however. At the time, my potential competitors were the NCR Aloha's of the world.