Longer Subscription Periods

Like most key activated software eg. Nortons and System Mechanic, I would love it if Stardock could look into allowing longer and discounted subscription periods.  My software is due for renewal in mid December, so with Christmas and my Car Registration, the last thing I need annually is a subscription to software.  I really hope you look into this as I and perhaps many other subscribers, would like to pay for a 3,5 or 10 year subscription.  I will not mention prices as that would be up to Stardock, but surely it would be easy to offer longer subscription periods than just 12 months.