According to your source, the top 15 sites that are visited by people who also visit Free Republic (1,672,825 People per Month) are:
http://defendourfreedoms.us/ 13,180 People per Month
http://therightsideoflife.com/ 11,472 People per Month
http://conservativegrapevine.com/ 7,892 People per Month
http://dailypaul.com/ 147,239 People per Month
http://peeringintodarkness.com/ 22,062 People per Month
http://patriotroom.com/ 31,796 People per Month
http://roguegovernment.com 27,733 People per Month
http://spectator.org 151,094 People per Month
http://pajamasmedia.com 227,845 People per Month
http://worldtribune.com 15,352 People per Month
http://familysecuritymatters.org 39,768 People per Month
http://obamacrimes.com 30,560 People per Month
http://freedomarizona.org 58,011 People per Month
http://redstate.com 108,204 People per Month
http://cryptogon.com 104,440 People per Month
There are enough people who visit both http://freerepublic.com/ and http://defendourfreedoms.us/ to make http://defendourfreedoms.us/ the most frequently visited site by people who also visit http://freerepublic.com/ , but not enough to put http://freerepublic.com/ in the top 15 sites visited by people who also visit http://defendourfreedoms.us/ . Free Republic has about 127 times the number of visitors as http://defendourfreedoms.us/ , but the number of people who visit both sites is enough to put http://defendourfreedoms.us/ in the top position of sites on FR, but not enough to put FR in the top 15 at http://defendourfreedoms.us/ ?
Free Republic is not in the top 15 sites listed on any of the sites that are on FR’s top 15 list, yet FR is larger than any of those sites, by a large margin. FR has anywhere from about 7 to about 212 times the number of visitors as any of the other sites.
There were enough people who visited both http://conservativegrapevine.com/ and http://freerepublic.com/ to put that relationship in third place on FR. How many people would it take to put them in 3rd place at a site with 1,672,825 visitors? How many people could visit both sites without putting that relationship in the top 15 at a site with only 7,892 visitors?
The numbers simply do not add up.