Are you actually trying to imply that having a DVD quality leak come out far before the actual movie even hit theaters isn't going to have any effect on the box office results?
I'm saying that it is demonstrably negligible. For instance before the Casino Royale bond movie made it to cinemas leaks appeared and preemptively the studios made a fuss about this hurting box office figures. Somehow it managed to be the biggest bond release ever.
In fact I would state that the only thing really hurt by leaks are mid level movies that are not good enough to provoke people to go to the cinema.
Further to that I would assert, as others have, that people who often pirate often visit the cinema and would under no circumstances part with money for these mopvies so it economically changes nothing.
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.