This is BS and I'm pritty sure it's against a law. In moment of purchase it was lifetime or till profitable. So this contracts cant be made limited time. They can sell new ones with time limit but old must stay like they was.
If they go thru with it then I'm sure it will be court desision if that is legal or not.

It would be like you buy TV from store and couple of years knock on door and salesman telling you can watch tv you bought 1 more year but after that you must return it to store. BS!