I have a test placement going with 3 ads and a timed rotation. Seems like it serves the same ad back to back sometimes. Can that be avoided?
Currently, it's just random. So the more ads you have in rotation, the less likely you are to draw the same ad twice in a row.
Avoiding the scenario where the same ad is shown twice in a row should be doable. if you want, you can suggest it on our Feedback and Ideas forum. Top voted ideas get priority.