Originally Posted by
denCSA
So, apparently, if RM determines that it can't sell the seat for revenue, they will release the inventory and confirm your request. That's probably why upgrades get confirmed even when C=0
Yep, that's pretty well known. But I think folks are talking about upgrades that clear without calls to RM when C=0, which is usually because of expanded (and invisible to mere mortals) C availabilty for EXPs.