It is a bit early to see Continental reward seats available, particularly for peak summer travel months on a route where they generally have little trouble selling out the plane with revenue tickets.

I'm not sure what you mean by "quota" of reward seats but it is quite possible that there would never be seats released on some flights. Even as a platinum elite on Continental I am not seeing inventory on their non-stop flights between EDI-EWR and there is increased inventory for CO platinums.