In my opinion any membership is only worth it if you use it. In addition to the camping discounts, some of the discounts offered to members by other companies like Allstate RV Help roadside assistance can make the membership worth while. As mentioned KOA campgrounds generally tend to be at the high end of the price point for their local area. However, they are generally decent campgrounds. Also as mentioned, points are accumulated based on each stay and can add up to an additional discount. What they call "hot deals" can be system wide or park specific and often include stay one night get one free or at a big discount.
Both the
Passport America and Good Sam systems have more participating campgrounds than KOA, but they run the gambit from terrible to excellent. Passport America parks often have time of year and length of stay conditions for the steepest discount. But, it pnly takes a few nights to break even. Good Sam membership includes a discount at Camping World, Gander Mountain and Overtons. The Good Sam Action Line's intervention in two warranty disputes on my behalf saved me over $1000. That's more than I will spend in membership fees for a long time.
The America the Beautiful Senior Pass is one of the best deals going. It provides free entry and camping discounts at many federal facilities. Many states also have
camping passes and
entrance passes that can be worth it if you will use it enough.