Minitel: what should have been a cautionary tale. Allowing "service providers" to charge money for every last little thing anyone does on a service results in, first a race to the bottom, as prices are compared. Second, a rush to ways to generate extra revenue through various irritating and scammy ways (the Yellow pages were full, and I do mean to the brim, of scams, same for the "porn" (mostly text or chat based, so…
The early days of European internet was similarly metered. Very few nations had anything like the US system of local calls being free. Only with the advent of DSL etc did flat fee net connections become "common".
All sites on minitel were like premium-rate phone numbers, differently priced ones.