Two points I found interesting - one, the owners of the leased aircraft apparently already made their investment back (with a profit) during the lease period. What happens to the aircraft afterwards is all gravy - they can sell the A380's engines, chop the rest up for scrap, and still have made plenty of money.
The second point, the biggest issue regarding profitability in the secondary market of the super jumbo is the enormous cost of an interior refit - $30-40 million US, which is outside of the range that airlines are willing to pay, so this fact, along with the limited demand for such a large, complex aircraft factors into the limited desirability.