1. A method for evaluating online content items, the method comprising: acquiring a first online content item from an online source, by a computer system using conventional webcrawling techniques, wherein the first content item is obtained via network connection; generating, by the computer system, a characterizing signature for the first content item; searching a cache memory architecture of the computer system for an instance of the characterizing signature; identifying, by the computer system, first RSS feed data associated with the first online content item and second RSS feed data associated with a second online content item, wherein the second RSS feed data is identified from the cache memory architecture, and wherein the second online content item corresponds to the instance of the characterizing signature saved in the cache memory architecture; evaluating, by the computer system, the first RSS feed data and the second RSS feed data; and determining, by the computer system, whether the first online content item or the second online content item comprises a content aggregator, based on the evaluating, wherein the content aggregator comprises a website presenting a duplicate version of original online content obtained from legitimate sources of the original online content.