Assuming what you received is actually something official from Disney and not someone trying to defraud you, it sounds like Disney's "magical beginnings" program (been around in one fashion or another for many years) where you buy at least the minimum 150 points and then Disney buys back the first year's allotment of points for $10 per point and applies the amount to your down payment. You do lose that first annual allotment of points although you still have to pay dues during this year, but it is a relatively fair deal -- not real bad, not real great either.