In organizations that do not test for PED's, or have so called "idiot tests," which test athletes in a limited and predictable manner, it is assumed that the vast majority of fighters will be supplementing with multiple chemical enhancers.
Some fighters may buy the latest, cutting-edge designer drugs and services, but even blue collar fighters with limited economic means will have access to most classic AAS and pharmacological assistance. Anyone with half a brain will be using, and the majority will be following common cycles which have stood the test of time and deliver proven results in sport. With universal PED use, the chemical and physiological differences between athletes are minimized compared to doped fighters fighting clean fighters.
USADA UFC changed the game in a fucked up way most never saw coming - now doped fighters are allowed to fight, but only if the UFC/USADA want that fighter to compete. Sure, USADA has to spin PR stories, and Jeff Novitsky ends up occasionally working overtime researching loopholes for this special class of fighter, but now the company is able to limit their profit loss due to failed tests, and is able to reward athletes that play nicely as company men (and punish those that do not play along with their vision).
This creates a scenario where the majority of UFC fighters fight basically clean, and a small group of high value UFC commodities such as Jones and Lesnar are still allowed to dope, as long as they are worthwhile to the company's bottom-line.
Performance differences between doped vs non-doped athletes are severe, and now USADA UFC is finally able to cherry pick (within a limited margin of error) who will succeed and who will fail within their org. They will bend and ignore their own rules when it makes the most dollars and sense for them. If you use and you are on Dana's shitlist, you can say "goodbye," but if you hit pregnant women and repeatedly test positive, you will be given the next available title shot (assuming you remembered that shot for your ass). Fair play is out the window.
KSW bless?