Sure, but the point is it's still growing. It was like that before- GSP (and Lesnar when he was there) were huge draws, and Silva to some extent.Before that it was Chuck Liddell, Randy Couture and a couple others. Other fighters didn't draw at all. Buy rates outside of the top stars have always been weak.
I agree the top stars are always the main draw, but there is much more publicity around it now than there ever has been.