This seems to indicate that for a 10,000 point award I could pay $10 and get what I'm short. Am I missing something here or would this work for me. It just doesn't look like there are any freebie promotional sign-ups out there for emails, surveys, etc.
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Purchasing Points

When you do not have enough points to request a specific reward, you may purchase up to 10 percent of the total points needed for redemption.
Points cannot be purchased, nor transferred, for merchandise rewards offered through SkyMall.
Points may be purchased at a rate of $10 per 1,000 points.
An "Authorization to Purchase Points" form must be completed and submitted to Marriott Guest Services to purchase the required points. Forms are available by calling Marriott Guest Services.