In the case of cost per mille/click, the publisher is not concerned about whether a visitor is a member of the audience that the advertiser tries to attract and is able to convert, because at this point the publisher has already earned his commission. This leaves the greater, and, in case of cost per mille, the full risk and loss (if the visitor cannot be converted) to the advertiser.
Is this because WP is now blocking outside adds on free accounts? WP recent advised users that ads may appear on free accounts. I saw that WP has a plugin just for Amazon posts, but any plugin requires a business account. In looking at the pay-to-play WP account details, it looks like one has to buy the second level account in order to “monetize your website”. StudioPress is a WordPress hosting service and framework that is designed to make setting up and running a WordPress site much simpler and easier. StudioPress comes with its own unique themes and SEO tools, collectively known as the “Genesis framework.”. Their affiliate program is solely for referrals to pay for a StudioPress framework account or buying a StudioPress theme. Previously, the affiliate program also included web hosting, but this is now managed separately by StudioPress’s owner, WPEngine.