Billboard companies receive revenue. They pay employees and shareholders or holdover cash, all of which is taxed.

So yes, your misunderstanding aside, billboard ads do pay for roads in a clearly understood way.

Sigh... not in any meaningful way.

The point is this, ads directly fund websites. Without ads those websites do not exist.

Bill boards do not directly fund highways, our taxes do, and those are collected 99.9999999999% from not bill boards.