The number of photos that can be published in the ad, depends of the Ad-Status.
In the ads in START-Status you can publish up to 10 photos. Ads in SMART-Status may include up to 20 photos.
In the ads in PROFI-Status You can publish up to 50 photos.
Ads with higher status have other benefits as well.
Such ads have longer Period of publication and higher Priority that raise its position upper in the the Ads-List.
The Ads of SMART and PROFI Statuses are showen in the TOP-block what makes them maximum visible for potential customers.