Sometimes to Tables in Wonderland card holders (there was just an offer like that recently). DVC members have had discount offers in the last few years as well. I'm not sure if there were AP discounts offered or not.
You don't have to go thru Living Social to get the current discount deal. All you have to do is a be a member of Club Cirque (which is free to join). You seem to have more choices for seats with this deal
I have no idea about any discounts but I just wanted to say that my DH took me to the show in 2010 and it is the most amazing thing I have ever seen. (well maybe not but close) I absolutely loved it.
I have read that you can show up the day of the show and purchase obstructed view seats at a reduced price . We went last year and there is really no bad seat . We sat toward the top and were happy because we could see the whole show .
We also purchased category four seats and there is no obstructed view. There isn't a bad seat in the house. I would happily sit up in the high seats again and didn't feel we missed a thing