If you preordered Ep 3, and they kept the money and never refunded nor delivered it...
THAT is a scam. This was not.
A shame, a disappointment, a blatant case of mismanagement (where they couldn't control their feature creep), certainly. People wanted to play the final chapter. They weren't demanding some brand-new genre-busting tech for it.
Where's the outcry for not making the final film in the Divergent series? Isn't that a scam for everyone who paid to see the earlier films and didn't get their finale? That were forced to READ the books to see how it ended?