I'm sure someone else (or the website) can confirm, but I believe they started giving starwood points (again) a few months ago. They gave them for a couple years around 1999-2000ish, but then stopped. When I spoke with the GM (european) back then, he said he could not convince the local nigerian ownership to spend the roughly $400,000 USD per year to provide starwood points, when the hotel is (or at least was) full 350 nights a year. Interestingly enough, you have always had the option to spend your starwood points on a free night there.
Though expensive (spent over $100 on a dinner at the "surf and turf" BBQ night by the pool), I've always found the food at all the restaurants within quite good, though they did fire the swiss chef last year. Some advice he learned a bit late - don't drink too much then start saying racially inappropriate things in a Nigerian bar. It won't do good things for your employment - or health!