Those affects arent immediate nor can you measure them in those terms. Her online footprint is large and exchanges look at those things, they look at twitter analytics and her use was in the fact that she could improve our stats.

Saying that you didnt see her affect the price thus she doesnt add much is wrong. Neither me or you can affect the price, does that mean wer not worth much?
No. These things are complex. I dont think influencers would "be a thing" in virtually every industry if they did nothing.

You wouldnt expect Kim Kardashian to raise the price of the PEPSI stock because of a few tweets and commercials, would you?
Theres still value in her though.