Honestly this is something i had in mind for my personal use. It still need lots of work on search engine to look for links smarter and return less not working links.
About audience, well i think anyone could find good use of this. But mainly its good for monitor news sites like cnn bbc aljazeera and so on, and those sites i primary used for testing so it should have best results on them.
do you have a specific target audience for this?