its free but my friend time is money. Terms in his blog like 'MLM' and 'refferal code' literally mean that im not just talking about your own time but also the time of people you're going to give your 'refferal code' to. Just because something is free doesn't mean you go bananas on it, we evoled from monkeys thousands of years ago.
wait, surprise! i was just kidding.
cheers.