Here's a fact for you newer MMA fans -
Pride FC was the big name in MMA for years. They put on the big shows on the biggest MMA stage in the world. They had freakshow fights, pro-wrestler crossovers, K-1 Kickboxer crossovers. They also contracted legit world ranked fighters and some of the best guys in the world. They always had a combo of legit MMA and fights for pure entertainment.
Other than a couple snoozer cards, you rarely watched a Pride FC card without coming away entertained. They knew how to put on a show and how to bring in more audiences.
If the UFC were to stick to purely fights by rankings for MMA purists, they'd go broke. They need the crossover stars and the odd fight based on celebrity. They are still billing legit ranking/contender fights, so the odd circus show is not a big deal if it brings in the money.