One thing people have to understand is that these TUF/Ultimate Fight Night cards are typically going to be fighters who if on PPV, would probably be undercard fights. Ocassionally we'll see a fight that would be main card worth, but probably the 1st or 2nd fight. It's just how it goes. Alot of times, the fighters aren't as fine tuned and the consistancy isn't there.
Although, I do believe the best money makers are the TUF Finale, IF THEY HAVE SHOW VS SHOW fighters instead of normal fights. If you follow the show, you can see glaring mismatches with fights.
On PPVs you're getting very well known fighters because that's where all the money is at, so the UFC is going to put the best matchups(MONEY WISE) together; Other than the fights that fighters earn/deserve that is.
My point is, don't bet too big on Ultimate Fight Night cards unless you see certain fights that you really like. If you want to make easy money, bet the TUF finale(if you follow the show), and PPVs. There's nothing wrong with wanting action on MMA fights, I mean, afterall, who wouldn't?!?! Just don't try to get rich quick off of these mid-level fighters because typically they're not as good, too sloppy, and "upsets" happen easily and the odds(hehe) you will payout suck.