Global Yahoo Advertising Policies
Stacked Ads
Ads which contain, or appear to contain, multiple offers from different companies within a single ad unit are prohibited.
Ads which contain multiple offers from the same service or company may be allowed - for example, Best Buy is allowed to run an ad promoting multiple products, assuming there is a consistent theme and product offering at their retail store or online.
This restriction only applies to standard banner ads, not to native ads that are approved by the Yahoo Ad Policy team to have stacked content.
Product and Price Images: In ads with multiple product offerings, images must be consistent in quality, theme and relevance to each other.
Acceptable imagery examples include: Florists showing images of multiple bouquets; retailers showing images relevant to the theme of the campaign (i.e. beach wear images in a 4th of July Sale ad or multiple images of clothing from a specific designer).