WWE has updated their Key Performance Indicators through the month of May. In them, the preliminary buyrate for WWE Extreme Rules is reported.
The show, headlined by Brock Lesnar vs. Triple H III, did an estimated 228,000 pay-per-view buys. This was down from last year's show, Lesnar's return [and subsequent job] against John Cena, which did 263,000 buys. The show did 209,000 buys in 2011.