This case was a wonder to say the least what with so many twists and turns yet what always stood out was the lack of evidences to prove that Knox actually killed her friend. 

As for her making money then,supposing her to be innocent, then its all the better considering the hefty amounts her family must have had to fork out both for the case itself as well as on constant traveling from Seattle to Italy. 

But to the question asked in the OP:Money can only take one so far but justice will sooner or later be served!