I've been using GB for a couple of months now--the first few which were half off (which was a great deal!). It's amazing how quickly things were turned around when I notified them I was returning an item... within days, they'd have another one out to me. But now that I am a full paying monthly member--the items take at least a week from the moment I notify them.
Timing is certainly suspect... methinks they may put a "slowdown" on your items once they have you hooked!