This is really not true. They fudge numbers. Edit: Apparently saying something factual gets downvotes at HN nowadays, so let me add some sources. http://www.

This is really not true. They fudge numbers. Edit: Apparently saying something factual gets downvotes at HN nowadays, so let me add some sources. http://www.compete.com/resources/methodology/ http://www.compete.com/resources/methodology/ http://aws.amazon.com/awis/faqs/#Where_does_Alexa_get_the_traffic_data http://aws.amazon.com/awis/faqs/#Where_does_Alexa_get_the_tr... http://www.quora.com/Where-does-Compete-get-its-data-from http://www.quora.com/Where-does-Compete-get-its-data-from http://wackao.com/which-is-more-accurate-alexa-rank-or-compete-rank/ http://wackao.com/which-is-more-accurate-alexa-rank-or-compe... http://www.bnet.com/blog/technology-business/comscore-money-for-real-ranking-controversy-misses-the-big-problem/2393 http://www.bnet.com/blog/technology-business/comscore-money-... First hand experience