If you don’t know me personally, I work nine-to-five(actually eleven-to-twenty) work shifts as a programmer. I support Lead Generation activities and I tried to monetize some of that expertise at elance. If you ever tried freelancing sites, it’s a clear rip-off in beginners mode. But it depends. Today I’ve earned some experience. No money, though :)
Aviasales.ru, for instance leaves 50-70% to their partners. I bet they’re queueing.