Instructions:There is an ongoing offer on Deezer in colaboration with BOSE. Everyone who has BOSE Soundlink Devise, can get Deezer premium account at 50% discount for 12 months.
Please go the URL. It will show a bar that says "Enter your promo code here". Click the button below that ("I don't have a promo code"). It will show another bar that says "No promo code?
Enter your SoundLink device serial number"
Enter the provided code there and submit.
That's all. It will show you the discounted price and offer details afterwards.
(The code is from an original BOSE Soundlink product. I'm not sure how many users can use it but give it a try. It should work.)