DIGIDAY.COM - May 20 - Grindr, the gay hook-up app, thinks brands should be taking dating apps more seriously. Grindr's 2M daily users spend 54 minutes on the app. Facebook retains users for ~50 minutes a day. Grindr, Tinder and Happn have a huge potential for contextual and native advertising to deliver results, particularly with the availability of first-party data. Grindr already hosts mobile banner ads sold by CPM alongside notification-style broadcasts that can be pushed to local and national audiences using the app's geo-location data.