2015-03-23 UTC
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tantek Foursquare has done a good job of 1) leading with useful to users application(s), growing that into a platform for venues, and 2) simply outsurviving every other (often hamfisted, e.g. Google Latitude or over VC-funded/hyped Gowalla, Brightkite, Loopt) independent commercial attempt at this. Background: https://medium.com/@dens/six-years-in-a-few-thoughts-on-foursquare-1ec31cbbe51c
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