To me the Poly is hands down the worst effort put forth by DVC, and the worst offering. And it is my favorite resort, which makes me sad. (It is also old buildings with bad sound proofing)
However, I did some Polyneasian math.
I used 150 points for my scenario.
150 points (with current promotion, you have to buy 137 points + 10% bonus = 150)
137*168 per point = 23K
150 points at SSR at 85 per point - 12750
difference of 10,250
David's currently pays 11.30 per non premium point, so rent out your SSR points, and in turn rent Poly Points (and pay 16 per point). that means, each year, you can convert your "SSR" points to Poly points for a price of 4.70$ per point.
Subtract the difference in Maintenance Fees and it is 4$.
So, for your 150 points, you would have to pay 600$ per year to convert them from SSR points to Poly points. Based on todays numbers.
Now, if you pull 600$ per year from your 10,250$ savings it will take you about 17 years to exhaust that 10,250.
Going a step further, I factored in a 4% annual return on that 10,250$
10,250 - 600 to pay your point conversion fee brings you down to 9,650$
Repeat over and over and your 10,250$ resale savings will be depleated in 28 years!
If you up your return from 4 to 5% it would take 34 years to deplete the 10,250$ (this assumes the spread on point rental remains constant);
6% and it is 58+ years
Now, I admit, this would be quite a hassle. But if you factor in the idea that you can probably book the Poly at 7 months most of the time you do not even have to jump through these hoops!
And in the event that Poly is hard to get at 7 months, you can "convert your points", or sell SSR and buy Poly resale.
I can not justify the Poly being a good buy.
If the poly incentive goes away, and you have to buy 150 points to get 150 points, at 168 per points the numbers become:
4% - 41 years to deplete savings
5% - 90 years to deplete savings
Even at 3% it would take 31 years
***This post was edited, as originally I had 400$ as the cost of the yearly point conversion in my spread sheet and posted bad numbers******