I made it public last year and it's quite enlightening to see what people have been using it for. E-commerce, contacts, work check-ins, image gallery, inventory, workshop listing, etc.
It's not the best tool, and I don't make a lot of money from it, but I'm happy I'm providing value to others. I still keep the free version around since plenty of people are relying on it.
I'm working on a new version catering to business's internal use cases now, with read/edit/permission control capabilities. Hoping to get it out soon :)
https://sheetui.com if you're interested.