That 450k for Overeem vs Stipe was because of Overeem not CM Punk. CM Punk was on the Main Card of 225 and it did less than 150k buys. If CM Punk was really that big of a star people would have wanted to see him give it a second try, people don't just completely lose interest after somebody loses. There was no proof of how much of a draw Overeem was because his only other ppv fight was against Lesnar but I think it's pretty obvious he's a draw. Type his name in on youtube and there's several videos with millions of views.