I've seen others use it but Jones uses it all the time to keep people at range. Like another poster said, the moment a top earner gets sidelined by an injury like that, it will be banned.
Why wait, ban it now.
Jon Jones, he's the dirtiest fighter out there, but manages to stay with in the rules.
Deliberately intimidates fighters from moving in by holding his fingers out - Check
Kicks aimed at hyper-extension - Check
Elbows thrown to rip a persons skin apart - Check