Some of these tools send happy customers to Google and unhappy ones to a private complaint form. That is called review gating, Google forbids it, and businesses have had their reviews wiped for it. This does not do that. Every scan goes to the same place, and what your customers write is up to them.
I am Rafid. I build websites and software for small businesses, mostly in Norway and the UK, and I give these cards to the people I work with. They cost you nothing. If you got one in the post along with a website, that was me.
Rafid Hoda, Oslo