OK, I appreciate the thoughts, and maybe I am missing something?
When I signed up, I knew what my points allotment would be, and I thought it might make sense. Since my weeks are all resale, this was my sole opportunity to try out Marriott's points-based program. I have points with Hilton and Starwood, and really like their flexibility, but I have high value weeks worth a lot of points. My problem with enrolling the Marbella week is that it is a straight 2BR (no lock-offs at Marbella), and Marriott gives the unit little value (2,975) compared to what I can get with Interval trades, owner-to-owner trading, or simply renting it out. It would make sense to be in the DC program if I could enroll my resale oceanfront KBC 2BR (a lock-off worth more points), but I can't. I already have an Interval account, so I'd just roll it back into that.
Like EKniager wrote, everyone's usage is different. I got some use out of the program by using the "free" week I got for signing up for a wonderful week at Surfwatch, but from now on I have to get some added value for the membership fee, and I don't see it where I'm going to get it.