That's also why you ended up keeping a box in your home that only help in very specific occasions (except if you're taking the train two times a week), and most people would just go to the local post office to use the freely available Minitel when really needed.
I think the worst part was that many of these services were late to embrace internet partly because of the Minitel being a stopgap.
That created some household drama... Who spent 200 francs on porn last month ?
I was carefully limiting my usage to free services, or paid services where I could cut (literally) the connection before the 1 or 2 free minutes. Memories...
The overlay of X.25 Transpac network on IP for payment terminals was cut off 2 weeks ago. [1]
[0] https://wiki.labomedia.org/images/1/19/MinitelMagisClub.pdf
[1] https://twitter.com/jlvuillemin/status/1543841021091528704
That's because the Internet is an open network where packets pass through multiple ISPs, you don't know what path packets will take, and sniffing packets is easy. Minitel was presumably a mostly closed system managed by a single telco who could keep out bad actors.