Bettors usually make multiple wagers on exotic bets. Parlays are very appealing to bettors because they are less-risky than straight bets. With a push, all bettors have their original wagers returned as there is no winner. Instead, skillful sports bettors may rely on "runners" to place and collect their bets. Spread bettors predicted Georgia Tech would win the game. Numerous online arbitrage calculator tools exist to help bettors get the math right. Voulgaris is considered one of the most prolific NBA sports bettors in the world. Interest in the pool has increased and attracts bettors statewide. "Policy shops", where bettors choose numbers, operated in the United States prior to 1860. The number that bettors have to choose from has been increased from 37 to 40. Chuck Darrow of "Bettors Insider" called the song "classic". The alleged bettors were never named.