Questão 62

  Back $\in J$une 2009, the globe’s potpourri of social-networking sites was extremely diverse: Google’s Orkut dominated India and Brazil; Central and South America preferred Hi5; Maktoob was king $\in$ the Arab world. The Vietnamese liked Zing, the Czechs loved Lidé, South Koreans surfed Cyworld. Two years after that, and Facebook has stolen users away from its rivals very fast. It’s completely knocked Hi5 off the map $\in$ former strongholds such as Peru, Mexico, and Thailand. After a tense back-and-forth with Orkut $\in I$ndia, Facebook has emerged victorious. And it’s becoming more popular $\in A$rmenia, Georgia, and the Netherlands, where local providers are making a desperate last stand.

  There are some glaring exceptions to Facebook’s colonization kick. Russians continue to use Vkontakte and Odnoklassniki, with Facebook a distant fourth $\in$ the rankings. China remains highly committed to domestic sites such as Qzone and Renren. But for the rest of us, we’re living $\in Z$uckerberg’s world.

(endereço eletrônico omitido propositadamente)

How many different social-networking sites are mentioned $\in$ the text ?