PSP owners just are not interested in the PSP software. It has nothing to do with piracy. My daughter has 10 DS games for evry PSP game, and doesn't pirate either. We have the stuff for homebrew DS, so if anything it's easier to pirate DS games.
For those who pirate some software, they typically will not pirate all software, and even if they do, it's more about collecting and they would never buy the software they pirated in the first place. So, lower hardware sales from hard to pirate systems does mean lower software sales.








