Generally the only people who would take the time to search for spoilers, are hardcore fans who will watch regardless. So I doubt it hinders the ratings either way.
Fav Fighters: Mir, Chuck, Hendo, Wand, Jason Miller, Kos, Alves, Guida, Florian, Benavidez, Jacare, Mousasi, Marlon Sandro
, Palharres, Diaz bros, Serra, Shogun, Phil Davis, and Cormier.
Least: Bisbing, Rashad, GSP, Jardine, BJ Penn, Barnett, Wilson Gouveia, Baroni, Marcus Davis, Varner, Shields, CB, and Kimbo.