Oh I don't doubt you, I was just reflecting that I think that paid toilets have largely been made free in the last 10 years or so.
But I'm sure there still exist quite a few, and I wouldn't be surprised if they were especially found in right-wing cities like Nice.
The modern toilet should let you pay with your personal info:
Toilet: "Sign up (learn more) or proceed with Google Account ..."
Google: "pissoir.fr wants access to your pissing history ...(Y/n)"
Toilet: By pissing here, you consent to the collection and analysis of urine samples ..
:)