Maybe I am not fully awake yet, but where is the joke?
Notwithstanding that Collectorz made a bad mistake in basing part of their service on something Amazon explicitly doesn't allow, I thought it was a pretty good sorry message. He should have been more apologetic about making the mistake in the first place, but it's generally a very open and frank message.
I'm coming around to the idea that he probably shouldn't have included the message from Amazon, but a serious, honest mea culpa is certainly in order.
"That's it for now. I really apologize for any inconvenience this may cause, but I hope you understand that this is fully beyond our control."
...because I've never written an Amazon API app, but even I know they have restrictions on usage wrt mobile apps.