"Maybe there's a different model out there but as far as I'm aware no-one has found it yet"
Sure they have. Sites just need to host the ads natively instead of outsourcing that responsibility. But they don't want to do that, because they don't want to take on that responsibility.
Sure they have. Sites just need to host the ads natively instead of outsourcing that responsibility. But they don't want to do that, because they don't want to take on that responsibility.