Well, we had a good reason for not getting earthbound, most of us were kids at the time, which doesn't leave us with lots of money, In fact, a lot of us (myself included) were fetuses, and thus lacking in the sentience department.
As for any of us who had spending money at the time, yeah, it totally was your fault that we never got Mother 3.
As for scott pilgrim. Well I'll have to refer to other comic movies for this.
Now, let's reference Marvel here, even if you've never read one of their comics, you know what to expect, they're culturally relevant after all.
Scott Pilgrim VS The World on the other hand had two possible audiences
1)people who had no idea what it was, and so had no reason to see the movie.
OR
2)people who read the same story in comic format, and so had no reason to see the movie.
The problem was, not many people had any idea who Scott was unless they already read the comic.
Unfortunately, fame is cyclical, so we'll mostly only be getting comic movies from the big two.
That is, unless some independent artist strikes gold again.
Anyhow that's my $0.02