So I got a reply that the lifetime coupon was only 1 year of update and support, and there's extra payment for 2nd year onwards. I have messaged OP via email to ask why he thinks this makes sense as what is called "lifetime".
Seeing that lots of people request for lifetime purchase on the forum, I think it will help many to clarify your idea of lifetime (whether it includes lifetime bugfix or algo changes). If not, then it makes no difference than the yearly plan, just with a discount.
The lifetime plan should be simple enough for anyone that have bought one. Lifetime = lifetime, including bugfix and version bump. Will wait for OP to respond here.