Judd's crew

Why are comedians organizing into crews for movies nowadays. You've got your Judd Apatow crew and your Sandler crew and your Stiller/Wilson/Vaughn crew and your Broken Lizard crew and etc. It's like comedy orgies. Not that I'm against that. I would be in the Apatow crew myself though. I guess that's probably obvious, they're on top of the crew world right now, with Superbad and Knocked Up and stuff. Though Strange Wilderness looks awesome. It's even got a mixture of three crews. Can't wait.