I wouldn't be interested if SDC did something like that to be honest. I read over the D23 page, and IMO, all it looked like was a fan club. You get a magazine, newsletter, certificate and then you get invited to special events which you then have to buy another ticket to get into. It just sounded too costly and not worth it.
I feel like SDC is above that, making the true fans pay for a membership into a club with special benefits. I don't know, I'll stop ranting now, but I feel like they could and would do better if anything ever happens for us.