[vasco]

To me this is more like the arc of

1. Get cable TV there's no ads!

2. Everyone switches to cable

3. Cable now has ads too

Than what you describe but I feel like it's maybe more positive of a change than that. But just slightly.

[vel0city]

In the US, cable had ads from day one. Especially considering originally it was just the OTA broadcasts bundled together.

Several of the first cable-only TV channels were ad supported from the start, and several others started including ads within a few years in.