Fill out the registration form on the site BuyInCoins.com (click here). In the "Referral" field enter the word CLUB (copy & paste) to get an additional discount 5% for a first order:
Log in to BuyInCoins and make a purchase.
If you have any problems with the registration, see the instructional video, which shows:
- how to register in the shop BuyInCoins
- how to set the default delivery address
When viewing the video expand to full screen and set the quality 720p.