I meant that nothing stops you from distributing your application through a different channel, like selling the .apk on your website or one of the alternative app stores.
Ah. I misunderstood. Though I'm really surprised you can't do that with iPhone apps. Can you not distribute an iPhone package (whatever the extension is) via alternative means?
No, because it can only be installed on jailbroken iPhones. Even worse, it's done by ignoring the package signature, which is a terrible idea.