Originally Posted by HarryT
It's a question of where people will expect to look for information. Someone who's not knowledgable about computers and who buys a Kindle Fire or a Kobo Vox may very well never have heard of "Android"; they will naturally go to the Amazon or the Kobo forum to ask questions about their device. That's the reason the forum is arranged the way it is. It's not an arbitrary whim.
Plus, these special store tablets (at least in the case of the Nook Color/Tablet and the Kindle Fire) run customized / non-standard versions of Android, as opposed to tablets all running standard Android with standard Google apps/market/etc.