Yes, as a matter fact I do. I work for an ISP and we don't track shit except whether you paid your bill or not.

Irrelevant. That's like asking why someone is moving a tiny car around a board while playing monopoly just because they had suggested poker for games night.

Someone can prefer the world be a different way while still participating in it as is.

Sure! But that's neither here nor there.

1) I don't have a choice, since everyone does it; 2) many types of marketing are just fine; 3) if everyone stopped doing this kind of tracking, it's not like the businesses would fail.

Would employees still get paid if their company didn't sell their information, or buy others'?

Unethical marketing behavior is never going to be the make or break point for a company, it's just plain greed showing through.