Maybe I'm not sufficiently hardware-savvy, but what's the downside here? I am more or less in the market for a modest tablet, but I'm indifferent to whether it comes from Amazon. Can someone recommend a better deal?
From what I could tell, (at least) the $50 Fire is currently ad supported, and by default Amazon Underground is ad supported as well.
edit: It looks like they've got the same situation vis-a-vis ads as all Kindles - yes they have ads, there is some attempt to make them unobtrusive, and they only have ads in the US.
http://www.zdnet.com/article/all-kindle-fire-hd-models-ad-su...
So that explains that. Now to find out how hard flashing a new OS would be. :)