Using the BetMGM bonus code “DIMERS200″ this Halloween weekend, new users in AZ, CO, DC, MA, MD, NC, and VA can unlock $200 in bonus bets by simply placing a $10 wager. This updated BetMGM bonus code offers $200 in bonus bets just in time for Friday night’s NBA action and Saturday’s college football rivalry game in the Big 10. BetMGM’s $200 offer is a great way to enhance your betting experience with bonus bets for Celtics vs. Hornets, Nuggets vs. Timberwolves, and Ohio State vs. Penn State.