A request is not a visit. Each visit might have a up to a hundred requests (or even more when showing live data and caching a PWA on first visit for example). That would translate to one user per hour or two which even unpopular side projects can get.
But you're right about the free tier of course.
2 requests/minute = 86400 requests a month. Plug in the other numbers from my earlier post and you’ll see the calculator say exactly as I said, around $2/month give or take depending on region.
