They know someone they can trust to stay bought.
https://english.alarabiya.net/en/News/middle-east/2016/11/07/Opinion-poll-68-of-Saudis-prefer-Hillary-Clinton.html
My bet is the house of saud wants some legislation on fracking, soldiers to fight for them.
And, thanks to their large donations to the Clinton foundation, they'll get it.
Assuming the corrupt hag wins.