Making $ 500 per month !

My friend is in affiliate marketing, and one of the way that makes him money is leads generation. He gets a contract of about 1 k leads generation per month, and he charges a dollar per leads from the US. He pays 50 cents to the leads that signup free under him, and thus makes ard $ 500 per month, doing almost nothing ! Its quite interesting to know that there are such ways to make extra money ! Wish I had that kinda network, lol !