Every experience may not be as bad as the one the OP had, but it’s surely well within reality. Both carriers and handset manufacturers are glad to sell anything and everything about someone to make a quick buck. They’ve literally been doing it for 25+ years.
Here’s a made up example, and it’s probably not even the best one. - Show Teckno-Detectives shows a “Cameo” of Grapple’s newest mixed-reality glasses. The data shows that 3.9 million additional people watched the episode. Investment firms who pay for the data notice and buy extra Grapple shares to cash in on the expected sales bump.
Let's say my phone gets $10 cheaper because of all this crap ware. If you have the aggregate of 1000 people that cost someone $10000. Is that really worth it? Is 100000 people worth $1000000? Is there some point at which the aggregate data becomes so valuable it overtakes the per-user cost?
That's what I mean - the marginal value of one person needs to be quite big for this whole thing to make sense.