American Express offers the first year for the AMEX Brussels Airlines Premium card for free and you will receive 16.000 miles (Miles and More).
//update: this offer is over, now you get the first three months waived and get 26.000 Miles bonuses if you got referred and hit the condition to spend 1500€ within the first 3 months.
2020/12/10 – links
2021/07/08 – only the first 3 months are waived, but the refered miles have been doubled to 20000 miles! If you spend 1500€ within the first 3 months!