finding groupon in Foursquare?

Foursquare Adds Groupon Deals - Liz Gannes - Social - AllThingsD
So is it beneficial to groupon or foursquare with all the groupon deals appear in 4sq's "explore"? seems like it is not just groupon, livingsocial and other group buy sites are also lining up in 4sq. So will you find this useful? Should some hongkong web/app follow that?