You say that you're downloading the entire internet for content, and that you'll be serving it up to your readers directly for the various reasons that you site through your app.
If you're linking to the content, no issues. But this doesn't sound like linking: you're stripping the content, and now you're serving it to your readers yourself, so isn't that taking the content from the provider and using it for your own purposes? Are you only doing this with providers that gave you permission to do so? And if not, is there some sort of fair use clause that you see applies here?
Just very curious as to how you see this model working with copyrighted content (and/or definitely let me know if I'm just missing the model here/misreading what was written in your post...end of a long day! ;-)