For at least the last two days, Arby's has purchased Promoted Tweets on Twitter for the term "foursquare". It's part of a goodwill marketing campaign running all month, in which the quick-serve chain will donate $1 for every Foursquare check-in at its locations nationwide.
Here's the Promoted Tweet copy: Check-in on @foursquare at any @Arbys location in #November & $1 will be donated to the @ShareStrength #NoKidHungry Campaign!
And Arby's social media team has been replying to nearly every Foursquare check-in coming through the Twitter newsfeed, while adding short comments like: "@consumerX" Nice check-in! You helped raise money for @ShareStrength #NoKidHungry Campaign! Thanks!..... Read more.