Penn vs Diaz did 280K, Condit vs Diaz did ~400K in PPV sales .... GSP vs Diaz did 800K.
GSP's 7 PPV headlines pulled in between 625K and 1.6M (UFC 100, with Lesnar on the main event, so not all GSP's doing.)
And somehow we are to believe a large part of that 800K was Diaz?
Even Condit and Hendricks draw as good or better than Diaz
UFC 133 310,000 (vs. Mike Pierce)
UFC 141 535,000 (vs. Jon Fitch)
UFC 154 700,000 (vs. Martin Kampman)
UFC 132 320,000 (vs. Kim Dong-Hyun)
UFC 143 400,000 (vs. Diaz)
UFC 154 700,000 (vs. GSP)