All signs point to the WallStreetBets reddit forum, which has been massaging and stoking GME for months. The ball apparently really started rolling about four months ago with a post in WallStreetBets entitled "Bankrupting Institutional Investors for Dummies, ft GameStop." In it, Player896 attempts to make a case for GameStop's financials, and the potential for an upside in the stock to stick it to shorts who have been praying for the stock's demise for years.