Hasta La Gadget!

It was inevitable the game-like features of Foursquare’s ‘mayorships,’ ‘badges’ and ‘check-ins’ would ultimately pave a path to paid advertising. Yes, that unassuming little geolocation-based
app that launched three short years ago at South by Southwest and has
amassed over 20 million registered users has decided to monetize.
Finally slipping into their big boy pants, Dennis Crowley and Naveen Selvadurai’s company have launched "Promoted Updates," with clients Madison Avenue ad agencies have been known to court over the years.