Yeah and I could beat Khabib and Gordon both in da streetz without all that pussy-ass cuddlin' if I had a gun!!1!
^About as relevant to the thread premise as your own post.
Yeah, so fringe that these guys are able to make a living competing solely in it at the highest level these days and getting their "Superfights" shown on UFC Fight Pass. It's not as popular as MMA, but it's growing much like amateur wrestling is.
Ryan is a better grappler than Khabib... within his ruleset of no-gi submission grappling, i.e. the one being discussed here. Much like Jordan Burroughs is a better grappler in the ruleset of freestyle wrestling than Khabib.
Furthermore, Gordon has discussed the idea of transitioning to MMA in the past, but refuses to do so out of respect for his coach and mentor John Danaher who has advised him to continue dominating/representing the sport of BJJ... one where he is making great money without the need to take MMA kinds of damage or be required learn tons of other skills to be competitive.