On a surface level, this is the gist of how it is going to operate:
American Express card holders who connect their card numbers to their Twitter accounts can post on Twitter to trigger a purchase of select products, including discounted American Express gift cards, Kindle Fire tablets from Amazon.com Inc. and jewelry from designer Donna Karan. The program will roll out over the next few days.
It's not clear yet what kind of cut Twitter would get from this -- if any at all.
For American Express, it appears that one of the biggest takeaways for the credit card company will be a more conclusive link between its customers and social media. But this isn't the first time Amex has collaborated with a social network as the finance giant integrated services with Foursquare over the last few years.
The news came about as Twitter itself published official statistics about its user base.
The overriding theme from the report is that mobile is the primary way people use Twitter, and primary mobile users use Twitter way much more heavily than all other members of the social network.
Taylor Schreiner, co-head of ad research at Twitter, explained the potential benefits for sales and marketing in a blog post on Monday, citing that average Twitter user follows five or more brands.
Bottom line: As consumers continue to shift their time to mobile, a big opportunity arises for brands. Mobile is in our DNA at Twitter, which means our platform can connect your brand to users in real time, wherever they are. Because mobile ads on Twitter are part of the organic content experience, they create a particularly powerful vehicle for brands to create reach, build frequency and drive engagement.
These findings should be of paramount importance as this e-commerce project moves forward -- not to mention just for online marketers in general.
UPDATE: Twitter also confirmed the news -- via tweet, no less -- about teaming up with Amex. Here's a promo clip: