It also uses 10+k drawcalls per frame. It's amateur hour over there, bordering on fraud. Even more frustrating to see how successful that model is. And how feverish people defend them online.
this is what happens when you focus on content before performance. they'll get that number way down over time.
games are data problems, like every other computer program. you must know your data before you can optimize how it is moved around efficiently. draw calls are a very good benchmark for this. as they optimize, it will go way down, if it hasn't already.