IF this is happening it's gotta be a mistake. Ads on paid spotify will be the end of my subscription.
Ad-free paid services were a brief aberration, essentially a bait-and-switch: "see how much nicer we are from the old-school competitors". Now that the competitors are gone, Netflix is doing ads, Amazon is doing ads... why wouldn't Spotify?
I hate it, but the reality is that we groan on online forums but don't actually leave.
To be fair, ad-free options for each of these later emerged. I pay up for them.