System automatically optimizes eCPM by choosing both - most profitable ad format and best ads to show.
All visualizations take part in auction, but only the best correlated are taken under account. Moreover visualizations from the same domain are folded - only the best visualization from each domain is taken under account.
System also makes sure that the same visualizations are not shown too often to a single user. Which means that user is served with bigger variety of unique ads instead of the same ones. Even when it seems reasonable to show only expensive ads, those are not clicked, because user is bored with the same visualization all over again.
Based on gathered data our platform also decides which ad format to show. Sometimes it is more profitable for publisher to show one big graphic ad instead of few text ones. But it is not your task to care about it. We do all of that for you, making sure that your advertising space will be as profitable as possible.