This squares with my experience as an exchange student in China. Once I went on a hiking trip organized by the Communist Youth League (as a non-member, obviously) and when I told some friends about it, they were surprised because their only interaction with the CYL was paying 2 cents a month in membership dues. They didn't even know there was supposed to be anything more to it... (The reason they gave for being members in the first place was that all students with good grades were encouraged to join.)