Show mobile ads when the user is disconnected

I tried to find some ad companies that will provide online ads, but I couldn't find anyone.

I think this opportunity exists. Ads will be loaded when the user is online, and when disconnected, they will appear in apps.

Do you have any experience with this problem?

Many people are disconnected from WiFi due to in-game ads.

What do you do to make money if the user is disconnected?