Foursquare's current ad business is tiny, Ad Age notes:
Currently, Foursquare's revenue streams include money earned from businesses buying promoted listings and specials advertised solely within the app. The company launched those programs in June 2012, a month after it hired Steven Rosenblatt -- the company's inaugural Chief Revenue Officer -- to help monetize the service. But those ad products netted the company just $2 million in revenue in 2012.
$2 million just isn't enough to justify the $41 million it raised in debt to continue its operations.
The move also signals a growing intensity in the location-based ad sphere. Facebook and Twitter already offer similar location-targeting ads. Mobile phones, of course, can be geo-located by apps and ads already even without Foursquare's data.
Bloomberg describes how far behind Foursquare is compared to Groupon:
Until now, Foursquare hasn’t spent a dime on
Foursquare will let all the merchants it works with buy ads and will expand its sales team to about 40 people.
That might help. But with only 33 million or so users, Foursquare offers a far smaller universe of data than its rivals.