Voting you up, up, up. Zipcar turns great profits in various locales, but they do not turn profit as a whole because they're investing heavily in their fleet.

Voting you up, up, up. Zipcar turns great profits in various locales, but they do not turn profit as a whole because they're investing heavily in their fleet. s/fleet/'sales team' and s/Zipcar/Groupon and you should see why Groupon isn't profitable yet.