Here is a Stereophile link on the same subject.http://www.stereophile.com/musicrecordings/55/index.html
Now some CD's are remixed from the originals. They may be better or worse. But no conclusive differences have been found in identical masters made for clubs. If you are buying a compilation CD made just for the club, that is not an original master, It was redone for the compilation. A compilation is like a...."Pop hits of 1986" type special issue.
While rare, a CD could be defective for other reasons. But I've had more defective store CD's than I've ever gotten from a club. The few bad ones I got from BMG over the last 15 years were replaced by them no questions asked. Try bringing a bad CD back to a store. They'll likely tell you CD's can't be bad..
I've been a BMG member since it was the International Preview Society Classical LP Club back the the late 1970's. To get me to switch to CD's when they were phasing out LP's around 1989, they offered me 2 free CD's per year for life. I still get my coupon for the 2 free CD's every year from them. So they've kept their word. Must be up to about 30 free CD's now. (Any single disc CD they sell.)
They also back then sent me an inventory of all their left over LP's for me to buy, for just a couple bucks a piece (shipped free). I still have some unopenned still in the shrink wrap!!