Yeah, a weird kind of freemium model. I am assuming it wouldn't be hard to turn off the encryption for say an hour every once in a while and advertise a 'free viewing' every once in a while to get people to subscribe.
Those 'free viewing' (canal+ en clair) probably had one of the biggest impact on french comedy TV culture ever. Some shows of that era are still on AFAIK.
And french politics. French politics in the '90s and '00s wouldn't be the same without Les Guignols de l'Info.