oh and I found this out the hard way....
If you have a waitlisted stay, you can't use those points to complete your waitlist. If you called to book and all your days were available, no problem. So if you know that part of your days are going to be waitlisted, you may need to go ahead and purchase your points for your available nights....
but part of me is thinking you can't do that. That you can only buy those points at the "need to buy time." Does that make sense????