Nope, they won't do that... I wanted to pay early and Ralph said it couldnt be done. My third anniversary is in Sept, and since I was planning to be a life member sooner or later, I thought what the heck, I'll pay now (and save $150.00)and become one of the few, the proud, the lifers . but alas it's not possible.
It does seem like a reasonable request as long as you're close.