Why is Apple still a member of the BSA? They might as well pull out. They aren't in the business of selling costly software licenses - they give most of their software away, ostensibly to drive hardware sales. But it seems to me there's little that BSA does that dovetails in their interest.
Possibly to drive more revenue towards iTunes and whatever other online initiatives they have in the works. While they themselves aren't being heavily affected by copyright infringement they do have an interest in more people turning towards legal outlets for content.
Furthermore, it is quite possible that they feel the need to maintain a good relationship with the RIAA et al.
