I'm not sure how your coming to your numbers. I purchase SSR at a net of $30 per point, i rent for $11 per point and my maintenance fees of $4.73.
I net $6.27 per point a return of approximately 21%. Even if I was to pay federal taxes of 20% on that. Thats a profit of 16.8% after tax.... I don't know of any investments that can net that type of return.
Even if SSR dropped to $40 per point and I sold... after my annual return I would also see a $10 per point profit cause I was in at $30.


P.S. I did not purchase my additional points to make a profit, I did it cause I need more points for family vacations. Yes, I'm going to rent the initial points I get to lower my overall cost to $30 but after that, I do plan to use the points for family vacations. Its just nice to think I could make a profit on it if I wanted to.