Foursquare announced that it charges some businesses to its "check in" data, data collected from all its years in business. Until now, the data was available for free to some 63,000 organziational users. Fewer than 1% of users, the heaviest users are charged a negotiated fee. Interestingly, Microsoft is already a paying customer, paying for and using Foursquare data in Bing as part of a February 2014 $15 million licensing and investment deal.
This is a new reveue stream since to date most of the company's money came from location-bsed advertising.
The Wall Street Journal is the ultimate source of the story, but it's got a pay wall.