Dear [Mooper],

Topguest currently enables you to get points from the world's biggest loyalty program, Priority Club, and rewards from the coolest hotels in America, The Standard hotels, just for checking in on foursquare, Gowalla, Twitter and Brightkite. We can do this because we retrieve precise geolocation information from each of the location-based services, and then apply our own anti-fraud rules. That way, we know that each check-in is a bona fide visit to the hotels awarding you points.
Recent improvements in out anti-fraud rules mean that, for now, we are ceasing to support Yelp, Loopt and Google Latitude. We will, of course, reward you with points for any check-ins that you have made to this point on those services, but will not do so going forward.
So, look forward to receiving your points soon and link up other services (Gowalla, foursquare, Twitter or Brightkite) on your Settings page!
Cheers,
The Topguest Team.