[whs]

I think if they want to sell to me and ads&trackers harm their SEO, it'd at least make the internet a little bit more private.

That or it'll be a cat and mouse chase like cname cloaking/proxying rendering those harder to statically detect.

[Gustomaximus]

True for you, but there are billions of people out there and your attitude is a tiny minority for what they would lose elsewhere.