My guide told me the same thing yesterday about add ons. I wanted 100 pts at BCV and have been on the waiting list since last May with no luck. I already have pts at 2 resorts and don't want to add a third, but it all depends on luck.
The points that become available are from people who sold theirs back to Disney. She also said that they won't send an e-mail around letting the guides know there are points other than SS. She could check in the AM and they could become available in the PM. You have to be the first one to send an e-mail.
Our other resort is WL she basically said fat chance on that since it is the smallest of all the resorts.
I got the spiel that SS is 12 years longer, good investment, etc.