Street Fight Daily: 08.08.11

A roundup of today’s big stories in hyperlocal media, technology, advertising and startups...

Groupon’s subscribers have more than doubled to 115 million so far this year, according to a person familiar with the situation. Groupon had 50.58 million subscribers at the end of 2010. That jumped 64 percent to 83.1 million at the end of the first quarter. Since then, the number of subscribers has climbed to 115 million, the person said. (Reuters)…

While it may be curious that advertisers, investors, and Foursquare’s ever-growing horde of users continue to maintain faith in the company’s fortunes, this allegiance has almost entirely to do with the enchantments of a single person: founder Dennis Crowley. (Ad Age)…