Can I set my own Ads without using AdMob?

I was just wondering:
Can I publish an app where, beside all the interesting stuff, in the bottom there’s a window similar to the AdMob one.
For example, I am using this Image component getting source from Airtable and i can swap the link.

The question is, can I show those images pretending it’s an ad or it’s against some policies?
If you click on the image it leads you into a shop, it works like AdMob but it’s self made.

Sorry if the question is strange.

Maurizio

Not possible

Yes, you can but you have to charge advertisers outside of your app.

What if they are my ads leading to my profile page for example or my telegram group?

I have published an app having a selfmade admob-like ad and it went through.
After few days i received a mail from Google Play Store saying that my ads were going against the policy.
Literally it was a banner redirecting to a Telegram’s group

If Google have already told you it is against their policy then why ask here hoping to get a different answer? No one on this forum can override Google’s policies or force then to make an exception for you.

If you want 100% clarification on Google’s policies then ask Google.