You need to go to your facebook developer site:
Create a new app for every app on mobincube.
Then you are redirected to the https://business.facebook.com. There create or select a bussiness account.
Then add the name of your app:
Then select the platform you are creating the codes:
The select banner to create your first placement.
Then you can create a new placement for an intersticial placement:
For each app you'll have an Ad Space and two placements.
Then, here are your codes to set in mobincube.
Now you need to open your app from a device where you have your facebook installed:
and you'll get a mail like this:
Now it's time to set the payment details:
There are 4 steps with your payment details:
The you can go to developers.facebook.com and there you can send your app to review.
Wait 24 h and if your app is approved then you'll get an email with the approval.