AMEX can use twitter to get discounts. they tweet hastag or search a term unique to offer and after the purchase, the discount is added to the amex card
Well, the number of American Express members who chose to participate are impressive, as is the resulting activity. Here are the statistics to date as reported by Visibli, which is keeping a real-time tally:
25,705 members have joined the program (72 new users per hour);
156,415 special offer hashtag messages have been tweeted (286 tweets per hour);
$7,051,729 total dollars have been spent;
$1,402,625 in discounts have been collected;
And the numbers continue to mount!
another AMEX and foursquare thing. spend $10 get $10.
Cardmembers can sync their American Express card with their foursquare profile, check-in and spend $10 at participating small businesses across the United States and receive a one-time $10 statement credit.
This is a fairly crazy way to buy things, but it does have a certain appeal to folks who like to thoroughly document their spending habits. You know the ones: They film themselves "unboxing" consumer electronics items, or they upload mirror pics of their new outfits to Pinterest, or they tell all their Facebook friends about the Kickstarter pledge they just made.