I have definitely gotten some mileage out of this £5 promo. More than £200. Also my partner has a supplemental card on my account and he is using it too and getting the credits. I am assuming that this is still within the terms as it says one eligible card per cardmember and he is a supplemental cardmember even if both our cards are under the same account. Hope I am interpreting this correctly?

Also am I right in thinking that it should be fine to use a different amex to get £5 in the same store if you use the foursquare method. The foursquare method is bound by different terms which does not specify only one card per person. So I can see no reason why I could not get £5 in a shop using my amex-website registered card and then get £5 in the same shop by checking in on foursquare and using a different amex card which is synced to foursquare.

Is it me or are Amex really throwing money at their customers these days? £5 for every small shop spend, £25 at harvey nichs, £10 at loads of chain restaurants over the summer, £10 back at loads of London restaurant festival restaurants, £10 for Xbox, west end shopping £25 off £50 spend, £5 off £10 starbucks.

I'm not complaining(at all) but this must be expensive for them. I guess they must be really trying to boost their UK business.