Originally Posted by bartla

For Belgian residents only (similar offers might exist in other countries where M&M credit cards are offered)

Double Welcome Miles when using friend referral link to signup for Brussels Airlines M&M American Express card

Classic American Express card (€60 per year)
Sign-up bonus: 3000 miles (normally 1500)
Premium American Express card (€120 per year)
Sign-up bonus: 6000 miles (normally 3000)
Pay your cellphone bill with American Express
Extra bonus: 2000 miles (one time)

The referring friend receives
Classic American Express card 3000 miles
Premium American Express card 7000 miles

If you want to make use of the bonus, ask a friend who already has a Brussels Airlines American Express card, he/she should have received an email with the referral information. If you don't a friend with Brussels Airlines AMEX, feel free to PM me for a personalized sign-up link. Thanks!