If you've ever been at a Skrillex show you'd know that he always states that he has created his own version of dubstep.
Also, Skrillex isn't mainstream. "is someone who jumps from trend to trend so that they fit in with the rest of the crowd. Mainstream is being what society thinks you should be, and look like." I doubt Skrillex is promoted on MTV 24/7 as something you should be.