Thanks for calling <a href="http://twinforms.com/products/index.php/medstore-onlinetop-ae77.pdf">medstore-online.top</a> Rizvi's Twitter connections opened the doors to otherinvesting opportunities. Last year, Rizvi led a $200 millioninvestment in Square, the mobile-payment processing companyfounded by Twitter co-founder Jack Dorsey, at a $3.25 billionvaluation. On Sept. 24, Rizvi led a $50 million financing roundfor the news reader app Flipboard, whose founder, Mike McCue,once sat on Twitter's board.