As Paul Newman once said, "What we have here is a failure to communicate."
As jununger correctly points out, we use the term "membership" for 2 entirely different meanings. Why can't we come up with clearer terminology? How about "subscribing member" for anyone who has purchased the 1, 3, or 6 month subscription vs. "regular member" or "new member" for anyone in the system but not yet convinced of the wisdom of the monthly memberships? If anyone out there can put it more succintly, be my guest.
Getting back to the original question, when you buy a girl's card via ANY means (the most it will cost you is 2 tickets - and there are several deals such as the monthly subscribing membership that can make it cost a lot less), you get the COMPLETE card which (almost) always includes full nudity, and usually includes sexually explicit behavior. Once purchased, it's yours FOREVER - don't worry. If you haven't bought one yet, go ahead, I guarantee you won't be disappointed.