I personally know many people who lived in the Saudi Arabia and achieved US visa very easily. For instance, if a guy from a country 'X' applies for a US visa, he gets denied. But, if the same guy lives in KSA for some years, and applies from KSA, he gets the visa.
Why is it so easy for people who lived in the KSA to get US visa?
Is it because of Saudi policing/intelligence gathering system, or because of KSA's alliance with the USA?