The nation of Jordan exists with a king because the British wanted a king there, so long as the King would grant BP some oil rights.

I'm not sure there's really a plethora of people who are pro-monarchy, but apparently it works fine enough day to day that the people don't revolt and the US/Brits don't attempt to put a democracy there.

It's like, very literal. The Hashemites cut a deal with the British as Britain sacked the former Ottoman Empire, leading to that state being a near colony.