I imagine it'll end up with some kind of body like the PRS for music, working to check the use of data and chasing for royalties. However, I'm really not sure how you can stop someone from using the data as it's less traceable than music, film, tv etc...
Not that many footballs need more money but this raises an interesting point about someone's right to own information about them...
The global implications of this, especially in stat heavy American sports, would be insane.