I have a funny feeling we'll be adding more over the next year! We already own at SSR and HHI, but wanted to get a piece of AKV and take advantage of the point discount. 50 pts is a start, but for all those who have addonitis, I know this won't be enough!
The add-on discount does make it attractive.
We did a small add-on of 25pts. early last year before we had ever stayed at AKL or AKV. We stayed in August 2007 and my first words to my DH upon entering the lobby were "we'll definitely need to add more points". When we got home we added 50pts. more. We figure we'll do the bank/borrow routine to get a decent visit every 3 years. In fact I'll be booking at the 11 month window for next August in a few weeks!