​Software to help elicit reviews.

Hi

I am investigating an idea of building a software for small business owners (like restaurants, hotels, e-commerce) that would help them gather reviews on popular sites (Google, Yelp, TripAdvisor) etc. I found some companies doing it with NFC products (vivtap for example) and people seems to like it. My idea is to replace NFC with a QR code. This way QR could be placed on the table, in the hotel room, in the menu and so on. Of course nobody is going to pay for QR code generation but I hope that on top of a free service I could add other paid services. Is anybody here somebody that could potentially be interested in this? I am not 100% sure what paid services would be (have some ideas) so feel free to recommend. Or am I just fixing a problem that nobody has?

thanks