Expect to be questioned on how you intend to promote or drive traffic to the affiliate offers if you are signing up to be a publisher. This is the single most important question and your answer will greatly impact whether your application is accepted or not. If you don't have a clear idea, it will only prove to the affiliate manager that you are not a valuable affiliate partner to include in their network. Make sure you have a good answer to this question.
Many people have made an immediately favorable impression by suggesting they are doing PPC to CPA offers. There are some more stringent rules for people who are using Google Adwords campaigns to publish affiliate advertising links, but it's still doable. There are two URLs you can add in an Adwords campaign; one is a destination URL and the other is the display URL. The display URL now has to match the destination of the site. In other words, you can't mask the offer showing one URL to the customer that takes them to a different destination than what they were expecting. Along with that, there are restrictions on the landing page destination URL; it must have the same domain name as the display URL. This can be tough to do if your affiliate CPA offer doesn't want you to allow the publication of their top-level domain in the offer. Many of the advertisers are aware now that they do have to create landing pages on their sites to overcome this new policy, and this will probably come back to benefit both publishers and advertisers. Thus, you can still use PPC-to-CPA methods, but you will need to be careful which offers you try this with and keep to the policies instituted by Google.
If you are unsure about how you are going to attract traffic to offers, check out Chapter 3 for some real-world examples. You don't have to be a genius at Adwords campaigns or even know much about Internet marketing to make this work. Don't be intimidated by this question, just have an answer prepared that proves you know what you're doing.