No app-ads.txt
1No app-ads.txt. Expected if the app doesn't sell ads programmatically; if it does, buyers that enforce app-ads.txt won't bid.
How to fixPublish app-ads.txt at the root of the developer website listed in your store page (https://<domain>/app-ads.txt) as plain text, with the lines your ad networks and mediation partners give you.
Evidence (1)
url: https://paypal-deutschland.de/app-ads.txt result: a web page instead of a text file final_url: https://www.paypal.com/de/home dev_url: https://www.paypal-deutschland.de/privatkunden/paypal-im-einsatz/iphone.html