So while I think affiliate programs are great and potentially offer up a lot of benefits, I’d also advise anyone thinking of starting one to consider the fact that as it grows so does your commitment to managing it. Resources will have to be diverted from your core business to support your network of affiliates as well as time spent preventing fraud or other problems that can arise.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.