I think this is a bit too rose tinted glasses. Being a paying customer doesn't necessarily mean you won't get ads, look at Netflix for a start. Their cheapest paid tier still gets ads. The subscription model will be an addition to the ad revenue, not a replacement.
Anyone can say A should mean B, that doesn't mean it's obviously true.
Very few services still commercially viable today actually force ads - meaning there is no paid tier available that removes them entirely.
I don't particularly like ads but this idea that any advertisement at any point for any good or service is by definition a cancer is a fringe idea, and a pretty silly one at that.
