With the exception of the recent PPVs to feature the Rock in the main events, year-to-year buy rates are all down when comparing 2012 events to 2013. In truth, Rock is an outlier talent, the kind that doesn't grow on trees and that they can't rely on exclusively to power their PPV business. Here they're acknowledging that, investing in the long term, and essentially hedging their bets for the majority of their PPVs. Maybe they just see the writing is on the wall and that unless wrestling goes through another boom comparable to 99- unlikely- they're ultimately safer getting guaranteed money for every event rather than waiting on the next megastar who could be responsible for dramatic increases in buy rates.