Jim McIngvale (aka Mattress Mack) is famous for winning $100 million in sports bets. But he's not really betting on games. Instead, it's a unique marketing strategy that helps him drive hundreds of millions of dollars in sales for his furniture business. Here's how it works! #sports #sportsbetting #sportsgambling #mlb #openingday #nfl #mattressmack #houstonastros #houston #houstontexas #houstontexans