I think this update wasn't just a business move for Jagex, I think it was just the easiest route for taking care of all the now inactive bot accounts that take up huge amounts of space on the highscores. Even though this outs the high ranking f2p players, which is probably something they didn't want to do after all the good pr they've been getting lately, this was probably the most efficient way to do it. It's kind of ironic given the thread.