So many of you missed the point. It was a perfectly good reason to see whether they are ripping off affiliates. I suspect one of my vendors is currently doing this to me too, so I will be ordering from a different paypal account on a fresh browser/ip to see what happens. I swear I have seen atleast 550 cleared, then the next day it was wound back to 450. Thought it may have been a memory lapse, but its happened a few times now.
This is not on a platform though, it is through the WP-affiliate plugin - hard to trust these self managed plugins but I will be getting to the bottom of it.