We do have some placeholder specific reports available through Ezoic premium, but because we adjust your ad layouts to suit user preference, it's usually better to focus more on your pages as a whole rather than specific areas. I.e. a placeholder will earn more from some users than others, and may not show an ad for some users as our system has determined that you stand to make more by filling another ad location. because our system is so dynamic, per-placeholder reporting doesn't tend to give that much info