You can get them by asking your account manager; it's not an automatic approval thing. If you don't have an AM, well, you're probably not big enough.

Also, I believe (but am not 100% sure, and certainly don't want to be quoted on) that: 1 - AFS pays very competitive rates; 2 - in order to get an XML feed, you will probably have to agree to exclusivity. This isn't all bad though as you often get a better rev share if you go exclusive. Typical periods are two years.