Trading app Robinhood late on Friday restricted purchases of 50 different stocks List included 'meme stock' GameStop but also General Motors and Starbucks It followed a wild week of trading fueled by anti-hedge fund Reddit insurgency It became clear that Robinhood was under severe strain with its cash reserves Company is required to place deposits with clearing houses to cover trades Robinhood said Saturday its deposit requirements increased ten-fold this week Company tapped credit lines for $600M and received $1B investor bailout