You will receive a Voucher / Premium key like this: BS8rn4zj5ekM3q5kAAAAAAA
For New user:
Click on the link: http://bitshare.com/voucher.html
Enter your Voucher / Premium key in "Voucher code"
Redemption: Creat new account
Enter your E-mail
Click on "Reedem Voucher"
For Existing user:
Login into your Bitshare cccount
Click on the link: http://bitshare.com/voucher.html
Enter your Voucher / Premium key in "Voucher code"
Click on "Reedem Voucher"