We have lots and lots of identical threads about D23 so you might want to search -- you'll find thousands of posts in the threads evenly divided between "sure" and "not at all"...
Disney doesn't publish their stats, but I would bet that the renewal rate on the D23 membership is very low -- unless you live in Anaheim or Orlando -- or plan to travel there for a Disney Expo or the like, you'll find very little beyond the magazine in your membership...and you can get the magazine at your neighborhood Barnes and Noble at half the price of a D23 membership.
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