A welcome bonus is an incentive that casinos use to attract new customers. Essentially, it's an offer that players get when they join an online casino site, and is pretty much like a sign-up bonus. Players must, however, follow the casino wagering requirements before their payments are eligible for withdrawals.
Oman is an Arabian country of fantastic nature and history. It's also one of the countries which base their laws on Islam, making all kinds of gambling completely illegal, including mobile and online gambling. However, this is only in theory. People have found a way to gamble underground, and especially using mobile online gambling through foreign websites.