"Tate can't get another title shot because if she lost then she'd not get another title shot. They don't want to put her in a spot where she won't be able to get a title shot so they're going to keep her from a title shot."
Faber's doing just fine even after losing title shot after title shot. Tate's popularity has jumped with each loss to Rousey. lol, as long as Tate continued to be a top WBW after a possible third loss to Ronda then her marketability and position would be fine, no worse than where it is now. It's a division where the champ takes out challengers in less than a minute routinely.
On top of all of that Rousey is not planning to do this until she's over the hill. There's a real possibility she won't be doing this still in 2017.