Yeah, the industry is definitely moving to that. Admiral, probably the most known ad-blocker-blocker already successfully circumvents PiHole and other DNS blocking by being served by the same domain.
I also expect Google to double down on Chrome Manifest v3 limitations if ad-blocking keeps getting more popular. Or even using DNS-over-HTTPS as a default on Chrome if ISP blocking ever becomes a thing.
For most customers, it seems they just went and bought about 2 thousand randomly-named domains and serve third-party scripts. However I've seen a couple places where Admiral was not blocked, because it was being served from a subdomain. I wish I had written down where it was to add to the EasyList or something. :(
