Google is the worst company in the world to work for ! At anytime for any reason it just does not matter they could suspend your AdSense account and tell you to go to hell . You do no even have to break any rules, you can have a increase in traffic and paycheck and they will suspend you for it looking suspicious. There will be nothing you can do about it. If that is the type of business model you like then go for it. Affiliate marketing you are in control of your earnings and your business. Ad Sense is for suckers and doesn't really take any skill for entry . I do not mean to offend anyone ! Just hate to see more people putting themselves in a position for Google to use up and spit out as they feel like.