We suspected it was a bad deal, but tried it anyway as an experiment. Our blog post wanted to point that out, but more so we took issue with the fact that most people think Amazon pays 20% of the asking price even when an app is given away. Their agreement with devs says as much. No one seems to know that to be featured you have to agree to 0%. Again we agreed, but the secrecy is where our beef lies, we wanted to make that public.
Can I just reply here? Here goes. I think you missed the entire point of the article. We agreed to be featured, we stand by that decision. What we take issue with is the public perception that Amazon pays their (publicly stated) 20% of the asking price for developers to be featured. They don't. Simple as that. Everything else is a beef, yes, but not our primary beef. Also we left it a month, we got featured June 27th, it's now August. Virtually no change in sales on Amazon.