Now, another good question to ask about Scott Pilgrim is how can the social-networking scene affect earnings? It may be something small, but at the same time, it may be just what the movie needs. From what I know, Scott Pilgrim has been trending on and off for the last week on Twitter and it is a very highly searched movie term. On top of that, it has only recently opened outside of Canada and the US.
Also of note, soundtracks, posters, t-shirts, and other film paraphernalia are going to be very highly bought (Much in the trend of Kick-Ass), especially compared to the currently competing movies.
I know that these sales aren't going to be seen since it already 'flopped' on opening weekend. But it may help what we're all looking for, that 'impact' on culture. That snowballing impact that starts with Annie Hall and ends at Ferris Bueller questioning why we are all sitting in that theatre still.