Different refresh rates for each user

It would be nice if you could allow each subscription to have it's own refresh rate. Some people don't post everyday or multiple times a day so it would be nice not to use CPU cycles or network bandwidth to check a sparse account. Some accounts I want to be check every minute others, I'd be happy with every hour or day. Also I'm not sure if the app queues the refresh process but it seems like ti checks every account at the same time.