Ask HN: Do Amazon own all of my apps now?

Just after the Amazon AppStore launched I decided to test the waters with a free version of one of my apps. The app has done fairly well on the Android Market so far, but I perhaps misjudged the type of users attracted to the Amazon AppStore. The app is immature to say the least, and hasn't gone down very well with Amazon users thus far. But that didn't matter since my main aim was to test out how the Amazon store worked, and whether or not I would use it in the future.

So today I decided to remove my app, since it isn't doing well there and reflects poorly on my work going forward. I contacted Amazon through their help system and asked for the app to be removed. I received a response informing me that the app must be removed from all other similar stores in order for them to remove it from theirs.

I'll post the full email if someone wants to take a look at it, but they pointed me to section 3.a. of the developer agreement:

3.a. Delivery Commitment for Apps. You will deliver electronically to us and continue to make available during the Term all versions of all software applications, games or other digital products (including any special or collector’s editions) (i) that are designed for the Platform, (ii) for which you have the rights required under this Agreement, and (iii) that are the same versions and editions (except as otherwise provided in this Agreement) that you or your affiliates make available directly or indirectly to any Similar Service....

This reads to me like Amazon want all my apps, and won't let me remove them from their store unless I remove them from everywhere! Am I reading this wrong? Or have Amazon laid claim to all the Android apps I've made or ever will make as long as I maintain an account on their AppStore? I'm happy to terminate the contract, which appears to invalidate this clause, but I had hoped to use the store for more useful applications better targeted at the Amazon market in the future so would rather not if I do not have to. But this agreement reads to me as very heavy handed.

Any advice?