OpenDoor is disrupting the real estate market with its new model. It buys homes and sells them on its platform.Opendoor stock rocketed 50% higher on Thursday after the retail favorite named Shopify executive Kaz Nejatian as CEO and co-founder Keith Rabois as chairman.The meme stock hit a 52-week high and continued a stunning run this year, with shares up more than 400% so far.Former CEO Carrie Wheeler resigned last month following a pressure campaign from investors that included critical comments from Raboi ...