Starbucks is celebrating it’s 40th anniversary by offering random $40 gift cards to people that check in on Foursquare today (users must also follow the Starbucks Foursquare page). The promotion runs until just before midnight (Pacific Time) tonight.
There are 500 of these gift certificates up for grabs to users that check in and unlock a “Tribute Badge”. You can also enter via email sending off a message with the subject line “Starbucks Foursquare Entry Submission” to email@example.com. Winners will be drawn March 16th. The complete set of rules can be found on the Starbucks website.