A high roller bonus is an offer that casinos give to players who deposit large sums of money. This bonus is aimed at encouraging "high rollers" or customers who play for the big sums to continue making large deposits and placing higher stakes on games. High roller bonuses are mostly associated executive or VIP casinos.
The United States is the land of freedom and opportunities. Besides that, it's also where one can easily play casino games by joining many online mobile casinos that cater to US residents. If one doesn't have the chance to go to Las Vegas, online gambling allows them to enjoy their favorite games without leaving their home.