Yes. But I would say innovate a little, and perhaps drop games that don't get any ratings after a certain time (e.g., 6 months) and/or games that consistently get rated poorly by users.
Usability innovation at that level will have to be accompanied with tests. But for now, it's a good idea to be very liberal in what you accept, at least so you can have a big enough catalog that you can refine at leisure later.