What's the deal?

eBay keeps threatening my app will stop working. It's version 2.something and is the highest version in the Kindle app store. eBay wants 5 and above, and gives me a download link, but I'd prefer to go through the Kindle app store.

I've not queried eBay (yet), but when I queried Amazon they a) said it was eBay's fault and b) handed me five bucks. Weird.

Anybody know the background of what looks like a feud going on here?