It's a great question with a tricky answer. We have a lot of ad partners and each one has it's own network of ad partners. At any given time an ad on BYC can be from one of many many different ad networks and trying to isolate which ad network and then which advertiser in that network is responsible for the ad can be super difficult.
Fortunately the "click url" will often give us the info we need to track down the ad network serving the ad. From that point, the ad network searches for the offender and tries to figure out why the wrong ad was showing in the wrong place.
In a case like this, the wrong size ad may have been uploaded into the wrong ad-slot and/or the wrong ad code or image may have been used when setting up the ad.
Fortunately the "click url" will often give us the info we need to track down the ad network serving the ad. From that point, the ad network searches for the offender and tries to figure out why the wrong ad was showing in the wrong place.
In a case like this, the wrong size ad may have been uploaded into the wrong ad-slot and/or the wrong ad code or image may have been used when setting up the ad.