Oftentimes VAs had no idea if they were working on a big IP so they were unable to negotiate contracts from a position of power. Knowing what game they're going to be working on gives them more leverage. They wouldn't be able to ask for a lot if the project is Homefront 3, but if they're getting a key role in MGS6 they can ask for more. Previously pubs kept them in the dark and got them at cheaper rates.
So dodgy, glad this has changed.