The $99 renewal rate prompted me to renew my Uni AP last year, something I have never done with my WDW APs.
I have had WDW APs twice over the years. I got three trips, and 16-17 park days, out of each, so I certainly got my money's worth, but the higher price made it impractical for me to renew when they expired. I simply let them go, and got a new AP on my next trip.
I do want to get a WDW AP for my next trip, on the assumption that I will want to make at least one more trip on the AP that will make it worthwhile, but the higher upfront price is making that difficult for me. I might wind up having to settle for a MYW pass instead.
I understand why the WDW AP is more than twice the price of a Uni AP; much as I love Uni, and defend it like a madman in the many "pissing contests" on the DIS, I am pragmatic and realistic enough to realize that Uni is only two parks, three resorts, and an entertainment complex, which WDW is physically much larger and offers more. I don't mind the higher upfront cost because I think it's worth it for the larger product.
But what has always disgusted me a little is the pitifully small discount that WDW Passholders get on renewals. New WDW APs are $462.21; renewals are $419.61, a savings of only 10%.
New Uni APs are $179.95; renewals are $99, a savings of a whopping 45%! Add to that the 20% discount on merchandise in the in-park and CityWalk shops (including stuff that's already on sale!), 20% off food at the in-park restaurants and counter service eateries, and even discounts at the Universal outlet stores in Orlando, and the Uni AP becomes a much better bargain to me than the WDW AP.