Having just found myself unable to upload to The Pirate Bay, I went to their discussion board site (forum.suprbay.org) to see what was being posted about the uploading problem. This is certainly not the first time that this sort of issue has been dealt with, but it's the first time I've ever seen it explained as: "The Pirate Bay is full."
I'm fairly sure that this is something of an exaggeration. And I'm pretty certain that it will be fixed, just no idea of how soon. TPB admins are notoriously reluctant to make estimates regarding things like that. I will continue to monitor.