Figured I'd weigh in on this... the lifetime membership is a one time payment for the life of your account and to discount it would drastically take away from site revenue and the idea that paying a large up front one time payment gives you the ability to not "have" to pay again.
And I also see that the lifetime option is no longer available. Although 10 years is quite a long time and, in my opinion, also worth the $200 shot to the bank account.