I use PayPal a lot and am fine with it either way. Whatever makes it easier to manage is the key in my opinion. A 5 year button or even a Lifetime button would be nice on the membership page.
There is a Lifetime membership PayPal button on
our Join page.
Maybe we'll consider paying for up to 5 years in advance and there could possibly be a discount for it, but historically we'll only allowed for up to two years in advance in case the dues went up. Personnally I don't see any reason for our memberhips via email to increase, but I believe due to all the costs (color toner, stamps, etc.) involved with memberships via U.S. mail we should consider an increase.