The Seminole Tribe’s sports betting app, the only legal app in Florida, is offering daily deals through a March Madness-centered marketing campaign coupled with relentless ads on social media. Calls to Florida’s gambling addiction hotline have surged since the app launched in December, drawing new users and longtime gamblers alike. The American Gaming Association predicts that U.S adults will legally wager over $2.7 billion on men’s and women’s NCAA games.