The more you spend, the more you get. This statement sits perfectly with the high roller bonus, which is a house's way to recognize players who repeatedly spend hefty sums in it. This bonus gives players access to some games which other bonuses may not allow them to take part in.
The Gambia is the smallest African country, surrounded by Senegal on three sides, and with a coast on the Atlantic ocean. When it comes to mobile and online gambling, there seems to be no licensing process of any kind. There is also no protection of players, so it is not advised to gamble on Gambian websites.