Dive Brief: 

• Foursquare is now charging its largest web partners for access to its location data, with heaviest users paying when passing a certain threshold. 
• The developer fees are a new stream of revenue for the location-based app which has been trying to beef up advertising efforts and broaden its audience. 
• For most app users of Foursquare's data, access will still be free, but the company is negotiating with about the top 1% of its 63,000 developers. 

Dive Insight: 

The location data is by far Foursquare's most valuable asset. Advertising has been a struggle for the app, so it's promising that it has found a way to tap into its data for a revenue stream. Going for the top-tier users will also help ensure it doesn't alienate too many users of the data.