No, I mean the customers who are party to the suit -- Apple's customers. Yes, there was other channels they could have gotten music, but the catalogs were not exhaustive and were just as locked down as anything Apple ever did.
ITMS wasn't the first to try to do legal online music, I'm not arguing that. They did get all the paranoid labels on board and made it easy, and at the time that was a big deal. I remember I *could* buy music online at the time, but it was mostly a pain in the butt from most sources -- it was no real competition to the illegal napster route. Then ITMS made things easy and had everything I wanted, so I started using it to buy my music online.
Had they not made the DRM deals, ITMS would never had much of a selection and that would have harmed me as a consumer.