Dang man, do you bother to READ what I say before you debunk it?
Firstly, I never said box office numbers "determine quality" -- but they are worth looking at, and can definintely tell you things about the movie. Pearl Harbor has a huge opening, but drops off immedietly. That tells me something about it.
Shrek starts off smaller (still big, though), however, it endures, and stays in the top ten for something like 8 weeks. That tells me something about Shrek.
As for cost: as I said before, when it comes to looking at the box office, you need to look at both the movie's cost, it's hype, and it's actual returns. Maybe you don't buy it, but I see these as interesting, and worth paying attention to. No one even implied that you can buy a good movie, or that all good movies do well. No one. Repeat: no one. No one. No one.
What I
DID say was that it tells you things about movies, and that good movies are not usually ignored for very long, which is why Shawshank is now successful through rentals/sales. I didn't say it was the end-all be-all, but if a movie makes a crapload of money, it's unlikely to be total crap.
If a movie costs $100 million, yes, I'll be more apt to see it, because I know more was put into it. I fail to see the problem with this.