Is possible to do the subscription payment by years instead by months ?
Yes. Here http://www.spotify.com/account/subscription/
You don't get any kind of a discount for it, you just pay 12 months at once. It's a very bad idea, don't do it.
Hey there you,
Yeah, you! 😁
Welcome - we're glad you joined the Spotify Community!
While you here, let's have a fun game…