Went to a Shell presentation on Kauai in Dec 2011. Besides the ditzy sales lady making unsubstantiated claims, their bottom line regarding points: for $28k and giving them our 3 weeks at a popular Poipu beach timeshare (cost $18k), we would get 18,000 points. Thank goodness we walked out. Went to Timeshare Resales next day and saw a sign for 6,500 points for $6,500, or $1 per point, totally legitimate, gets registered with Shell without a hitch. He said points are a creation of the marketing dept, as a way to sell underperforming inventory at high prices.
Shell offered us 18,000 points for $46k, or about $2.5/point. If you want their points, buy them on the resale market for $1/point.
Shell is a total rip off.