That's actually evidence that it could have hurt sales. The biggest bond release ever demonstrably has the most interest ever. The most likely that someone will shell out the cash to see it (as hundreds of millions did). If pirate DVDs got sold, they're more likely than ever to have replaced/supplanted a ticket sale.

Its not fair to say "well they made a lot of money anyway". Its also then true that they lost more money than other movies too.