Found it:
It's optional: deposit as traditional week or points. CIG is an upgrade that costs $$$ and is non-transferrable.
Here is a long discussion about the CIG program: (there may be ads here--only read the text; too long to post)
http://timesharegame.com/all-about-interval-international-points/
Reading another board.... It looks like Windjammer has switched to an internal points system vs weeks/size unit sales. They are (apparently) actively repurchasing previously sold week/size units and converting them to the points sales. Previous contracts may have ROFR/Transfer fees associated with the sale. There are several for sale on Redweek and others--not cheap either. But, certainly below developer (I'm guessing). Older units can probably do 'weeks' in Interval, newer units apparently use CIG and points. Not sure if new units have 'weeks' deposit options (unless it's like Worldmark).
Exchanges
Windjammer Landing Villa Beach Resort Saint Lucia is excited to offer Interval International as our affiliation to families looking to trade their time from Windjammer Landing Villa Beach Resort to more than 2600 resorts in over 75 countries. Interval International is the exchange company of choice for leading hospitality companies like Four Seasons Residence Clubs, Hyatt Vacation Club, Westin® Resorts, Sheraton® Resorts, and Marriott Vacation Club®. Windjammer Landing has also been awarded the premier status from Interval International, which gives higher trading power to our families when they decide to exchange their time elsewhere.
In Addition, Windjammer Landing is proud to announce to our families the new state of the art program from Interval International called Club Interval Gold or C.I.G.
With Club Interval Gold or C.I.G. families will have the ability to deposit their week for a week just as they've always done, or exchange their week for points, which they can use for an entirely new vacation experience that gives greater flexibility for our families ever changing lifestyles. Now, families have the option to redeem points for full or partial vacation weeks, and a variety of accommodation sizes & travel seasons. Families can even apply their points towards a cruise, golf, or spa vacation.