American Express supplementary cardholder 5,000 bonus points
American Express are running a supplementary cardholder promotion for the month of August that rewards members with 5,000 bonus Membership Rewards points for each new supplementary cardholder added.
To participate in the offer, simply call the American Express number on your American Express issued card and ask if it's available. I was informed when I tried earlier in the week that it is running for all of August. I am not sure if it includes all cards so it is worth asking just to confirm.
A fairly easy way to get 5,000 points and always handy to have extra cards around, especially when they're free.