In 2005 , the two convinced their older brother Geoff , a budding Web entrepreneur himself , to invest $ 250,000 and his time to help them launch MyYearbook.com , a social-networking site based in Skillman , N.J. Soon after , the Cooks merged with Zenhex.com , an ad-supported site where users post a variety of homemade quizzes , more than doubling the number of eyeballs taking in their site .