Last week ended with big news in the reality TV world: Big Brother’s Brendon admitted to cheating on Rachel after his Skype affair with a woman was exposed on Twitter; that exposure included a naked picture of him . Meanwhile, Twitter is a little quieter now that several reality stars, including Ryan Seacrest, are still offline because their fans haven’t donated enough money to bring them back. But mostly, this week was marked with lots of quitting, starting with The Amazing Race, where there was no consequence for quitting a task . On Survivor, after NaOnka Mixon and Kelly Shinn got an episode celebrating their quitting , they were rewarded and showed different sides of themselves . Finally, we learned that American Idol will let its viewers vote online for finalists next year, but getting fan support doesn’t translate into record sales. Last season’s winner, Lee DeWyze, had the worst sales of any American Idol winner . The Past: last week’s most-read stories Big Brother’s Brendo...