Speaking as someone who managed to get uncle Murdoch to sponsor writing an adblocker/payment tool similar to yours (while I was working at an adtech business), but then got stalled by the publishers (who on avg. hated ads), specifically the direct supply sales people (who tend to have louder voices in those companies, have mortgages to pay) -- the issue is systemic.

ISPs are already selling your data to a bunch of data brokers, I don't think ad spend is the only goal there.