From the Acquine website
"A rule of thumb is that if the aesthetic quality of a photo is obvious to most people, it may not be worthwhile to seek Acquine's opinion on it because Acquine may assign funny scores in such cases."
So in cases where the correct score is obvious, Acquine's score can't be trusted? That rather neatly avoids validation or refutation of Acquine's results. This is suspicious and seems to cast doubt on the trustworthiness of its score in less obvious cases.