If you buy 200 points resale for say $18000 all in..... and rent them every year and clear $6 per point above the maintenance fees, your return on that $18K is 6.7% per year. Not great, but not bad. You can probably do better elsewhere.
The real rub is that at the end of the contract you would no longer have the $18000 either. So if someone wanted to use it as a money maker, you can, but you either have to sell out when there is still value in it, or just recognize that you will lose the original investment in the end. You would get back in the neighborhood of 3X your initial investment over the length of the contract..... give or take. Of course inflation will drive up the income from the points, but your dollar in 30-40 years is worth less, so that part could basically be a wash.
In the end it's not a very good/sound investment vehicle......