In the spring of his junior year he worked with two graduate students to pool $10,000 in order to found social network Vostu, which aimed to "fill a void left by online communities in which English is the lingua franca", like Facebook. According to Kushner, Latin America was a promising market for a Facebook-alternative and new social networking site because "[it was] a place where Internet use is increasing every year, and technology is booming at a rapid pace". Vostu laid off the majority of its employees in 2013 and significantly scaled back its operations after a copyright lawsuit from a competitor accused them of copying games.
