I wonder if some were ever lost in spam folders. I got kicked off of the "sure" list, or capability, at some point and I have no idea which "sure" I didn't actually buy. Best I can think of, I did a "sure" on something where I wanted one of 2 options, but didn't know which, and did sure for both knowing I only wanted 1. No idea at this point, there's very few knives I "need" so badly that I want to buy as soon as they're released anymore anyway. Most of them, for me, were just to let me know if something was available and I would decide when it was actually available if I wanted.
The email I got from Mike stated the move had as much or more to do with Mail Chimp's political righteousness BS than the lack of fulfillment.