13BTC is a lot of money in most part of the world.
For what it's worth, they hired this guy to make their coin logo
http://bitcrea.comHe's pretty good, created the Boolberry logo, Sync, coinheavy, This Week's Coin, I doubt he is overly expensive but i'm sure he asks a little bit of money for his work, probably 500 dollars/1 BTC at least. As a graphic designer that is what I'd charge for that quality.
Like I said too, Karen Su can be verified on Facebook.
Did you get message from herself? Did she tell you that she was involved in this?