1) Nate:
http://mma-manifesto.com/ufc-fighter-salary-database/salary-main/ufc-career-fighter-earnings.html; It says here that he has made nearly 1.5 million during his UFC tenure; Sterling made 24k in one fight recently. If he fights upwards of three times a year, he makes a very solid wage for a guy with zero solid wins on his record (not counting bonuses or sponsorship pay);
2) You are naive, and it is painfully obvious. Those figures I presented didn't even account for interest which on
good loans is almost 5%. Do the math, it isn't close and you are silly for even stating such a thing;
3) They all pay next to nothing for an education and have the ability to make millions. The median salary for a pro-boxer is 40k (
http://work.chron.com/salaries-pro-boxers-30165.html) and they tend to fight much more frequently, for less. The guys in the UFC are paid relatively well; that is a fact.