Our friends at the American Gaming Association report that 45 million Americans could bet on NCAA Basketball Tournament games this year. Those who wager on the men’s Division I Basketball Tourney could also place more than $3 billion in wagers, according to the research. Part of the reason for this is obviously the fact that sports betting regulation continues to spread across America, with nearly 30 million additional adults allowed to legally bet on the tourney this year over last. It’s expected that almost $21 million will be bet on “outside of bracket” contests either online, in person, or between…