We all recall when Pickens got into Oklahoma State football in a Big Way ($$$) and how they made a bit of a splash for a while. They are still decent. But Deep Pockets of that ilk NOW could really alter a landscape, if such a donor is interested. Take, say South Carolina. Give them a big fan who is a billionaire and runs multiple car dealerships, whatever. He NILs recruits for ads mostly because it fills the roster with 4 and 5 stars, not that it aids sales.
This is unlikely at Purdue or NW, but it COULD happen at quite a few places.