This sort of bonus means that a player gets a refund of some money used in the betting process. It may be an assurance that one is refunded if they lose the first bet, or reimbursed the service charge when betting. The guarantee allows the player to bet without risk of loss for some time.
Oman is a very fascinating country, well known for its hospitality. When serving guests, they offer them coffee and dried dates. Oman is also renowned for breeding Arab horses. Online gambling is illegal due to Islamic laws which state that gambling is an unclean sport. People caught gambling online will be sent to jail.