As we had one in every house, there was "online" services which were very popular. Like school registration and ordering. And nationwide yellow pages! 24/7 ! Without the need to get to the post office to check for the county directory, on opening hours .
It was also a wonderful tool to connect people in communities. There was different rate charge and the cheapest were very low. I remember spending nights and nights chatting. https://fr.wikipedia.org/wiki/RTEL
There were a few 'pink services' (can't call that porn really, it was just chatbots with (sometimes!) real 'hostesses') as mentioned, but they were nowhere near the biggest. The biggest after the lorry service were sport services (Stade 2 etc during footy times or Tour de France) -- then .gov stuff and education (exam results).
I think for most people the 'pink services' were the ones that were advertised most, therefore there is a bias as to what was used and popular at the time, but from my point of view, it was nowhere near as popular as what people believe.
For the technically minded, we were running a (lot) of Pr1me computers running Primos -- in fact we were their primary customers before they died; we eventually moved on to HPUX on the very first PA-RISC that came out. The Pr1mes continued ticking along for a long while...
And speaking of root -- on the Pr1me was also 'root' as a system engineer, and I remember fondly the day I messed up the parenthesis in a macro, and ran a tool that proceeded to memset() and erase the whole of the shared memory on the machine. That was about 30 people who all called.... the system's engineer (me!) to ask what was going on! Needless to say, it was blamed on a cosmic ray.
When we switched to HP it took quite a while to get the same level of performance with HP's own X25 hardware/software. It's also the one and only time I ever played with X25 socket() API.
I do recall being in Baynard House one night and having a furious shift leader burst in and shout that he wasn't putting up with Shades overloading various mainframes around the country ("what, my little box?" :) ).
Although I never saw much backroom stuff on Minitel, from the outside it was pretty sweet compared to working with BT.
I should have really had a trip out to baynard to check it out as I was I suppose the dev-op on the Dialcom side working on the new Billing system.
What I mean to say is that minitel was in an incredible position to grow and be a massive platform, worth 3 digit billions of dollars, and instead traded this potential for charging for every second.
This pushed all the random services (granted, mostly chat, and forum like things) that were cool at one point off off it, and first onto BBS'es, then the internet came with some free server space included in virtually every internet package. A lot of these were initially let on the platform, then bled dry, and died.
But minitel, without a doubt, could instead have pushed those services, and could have made it easy and cheap to host one of them, a decade before the internet arrived and it would have spread like wildfire instead of the internet, sooner, faster and with a few upgrades maybe even better. Instead, it charged by the second, made maybe 100 million euros total profit and died without any evolution at all. Because of France Telecom's business practices, everything on it was bled dry and was always losing money. And FT is a monopolist, they just bleed their services dry, and when they die, no replacement is forthcoming. At least things like Amazon have the decency to still offer the service when they destroy their supplyers. FT, however, just destroys.
And it was all for nothing. Despite forcing these charges, it has (well, had, these days) a reputation in the financial industry for being a place where sometimes interesting companies become shady, then die. All killed in the name of France Telecom's business model, and nonexistent profits, just so it could do it's charge-by-the-second thing (perhaps you can notice that I'm not a fan of telcos). Just so all the "profit" could go to France Telecom and nobody else could maintain a living on it.
Minitel is the ultimate example of France Telecom's economic sabotage : a massive monopolist that just couldn't stomach other people profiting even a bit of their platform and ending up destroying the market it had a monopoly over, all because of management incompetence, intransigence and utter indifference. It's not just that they didn't see the opportunity, as that requires looking for opportunities in the first place : they just didn't care. FT management is a reward position you get when some important politician owes you a favor, which makes it a given that high level managers are utterly incompetent, because either they are incompetent, or they're not incompetent and are aware that it's a favor : their days are numbered before they start, so they bleed the position for all it's worth and spend their time elsewhere.
They were bringing Ruinart champagne /by the pallet/ for employees to enjoy. Basically you could throw a party any day (for anything! like "I've just got new shoes", and you had unlimited champagne. Remember that was in 1989 -- a LONG time before dot.com era and even a long time before the excess of the 90's. Also a long time before it became socially inadequate to be rather drunk at work (on champagne only, mind you).
The employee benefits were also incredible, even by banking standard. I think we had 8 or 9 weeks paid holidays, and anything you didn't take was... paid to you at the end of the year, on top of the bonus (which was also generous).
In other words, not exactly a company that was skimping...
In 1998, Minitel generated €832 million of revenue, of which €521 million was channelled by France Télécom to service providers.
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.
Which reminds me, that's also one of the rules of Project Xanadu: http://xanadu.com.au/general/faq.html#2
I wonder if that had turned out the same way had it ever been completed (or shall I say whether it will turn out the same way if it's ever completed?)
The thing people always forget to mention is that minitel was metered. Every second you spent on minitel was charged, with some part of that charge shared with the content provider. There were also content providers (ie. "webshops") that paid for the customers to be able to be on their site for free.
The reaction to increased scams ? Why France Telecom stared charging more, of course, making the scams worse ... and worse ... and worse. Then suddenly all was abandoned in 2003 or so, with only paid-for sites remaining (essentially web banking, and some stock broker type stuff that's similar but more complex than web banking).
Of course, the whole exercise was repeated with "value added services" on Cell phones in the late 90s and early 2000s (also charged by the "time spent online", and also filled to the brim with scams), and now again with android and iphone.