Has anyone ever gotten a Blockbuster award - 6 free rentals?

It says 1 per week, for six weeks, but does that mean you have a 6 week period in which you must use them? Or can you spread them out over a longer time period? If I were to rent, I think it is worth more than 1000 hhonors points, but not if I am forced to use them quickly.

Anyone know the details?