And you're able to slice and dice the data and actually take some action from it and drive more revenues for your business. Now, what I really like about Google Search Console is that you can look at the crawl rate, if there are any crawl areas on your website. You can look at your search analytics. You can see what the click-through rate is on the search result pages.
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.