Yes, I agree it is getting milked for all it's worth. However, if they keep adding awesome new features like the awesomeness of World Tour, then I have no complaints. As long as it keeps getting better, no problems here. However, the 80s edition and the Aerosmith ones were not necessary. However, I did get the Wii Aerosmith one for 10 or 15 bucks new at Sears Essential, so I have no room to even complain on that one.
-Rob