Edit: Just tried to log in ... question answered, Account is dead. Lasted 1 day.
I have bought so many "lifetime" Spotify, Netflix etc etc accounts and every last one of them die anywhere from a matter of hours to sometimes a few weeks. Everyone has a "method" but in the end they rarely ever last. I am sure this seller is no different than the rest of them (or maybe he IS the rest of them with different name!). Didn't get one from this guy but they all end up the same.
With Netflix just create an email account and sign up for a free trial. At least you know how long it will last.