One of the types of ads on Facebook is Carousel Ads. They consist of a carousel in the 2-5 images and/or videos, titles and references, or calls to action in one advertisement.
At this point, OWOX BI does import costs for this type of ads, yet does not support this functionality in full. The reason for that is the ability to mark each of the carousel items by different UTM tags. This complicates the process of cost allocation in the ad/campaign when imported into Google Analytics.
However, if all the elements contain the same links that match the main link, the cost data will be imported accurately.