Well if i sat down and coded a real nice hack for vbulletin and it was an original idea, then all of a sudden another version popped up a couple of weeks later for vB3, i would be pretty cheesed off myself. The way i look at things, when im ATTEMPTING to create a hack for vB, i dont look down the list of hacks and say "Ohh i can make a better one of that" etc, i look for something that isnt there, so i can make it myself. If an idea has been thought of and created, then why bother making more versions of it?
Sure other people probably did make store hacks for vB before Lesane did, but Lesane was kind enough to spend the time making it and then releasing it, FOR FREE. He could have charged for something that big and there is no denying how popular that hack is.
All in all the way i see it is, if a hack has been made for vB2, leave it too the hack author too make a version for vB3, be original