Affiliate marketing isn't a job. It's a business opportunity. That means that there is unlimited moneymaking potential. But it also means that how much you make is proportional to how much work you put into it. That doesn't mean that you have to make it a full-time effort, but it does mean that you have to keep working at it. It's easy money, relatively speaking, but just signing up for a program and putting up a link or two doesn't guarantee instant income.