Would you believe -- All these years I have not seen any discounts on annual passes except the lower prices offered to DVC members?
Only one adult family member needs to have an AP to get the perks associated with it such as free theme park parking and some resort room discounts and the dining discount membership (Tables In Wonderland fke DDE).
I know earlier this year AP holders were sent referral coupons where the new referred AP holder got a little discount and the current AP holder received a referral check. I was hoping that Disney might do something like this again.