I really don't see how high the reward could be. Even with people knowing her what do you think the long term draw is? I mean seriously.
Do you really think there are wrestling fans sitting around saying..."Oh hell guys TNA got Chyna! DAMN! Lets watch them every week."
This isn't like getting Kurt Angle or even bringing in a way past his prime, and usefullness, Hulk Hogan.
it's a female wrestler. A side show attraction. It's good for a very short term pop, and some people tuning in to see if she's still messed up, and then it will quickly fade out and die and will bring absolutely nothing to TNA in the long run.
You're acting like TNA brought in Stone Cold or The Rock or HBK and this is going to be some mega amazing move to TNA if it works out.
It's not. Even if she works out, doesn't screw up, and is there for 2 or 3 years she isn't going to do anything for their over all ratings, their product, and I doubt, very seriously, that outside a very small handful of wrestling fans that she's going to draw them a whole bunch more people tuning into their product cause she's on it.