[valuearb]

No, the reviewers never see the scam screens. Once approved the scammers change a setting in the cloud and the app starts opening in scam mode.

[sireat]

If the app is working properly during review, why change it to nonworking later on?

It is like that Key and Peele skit about robbing a bank by working there.

If you can create a working app why not leave it as is ?

[valuearb]

It was likely a very poor keyboard. Just operating well enough to pass review. Once a user saw it, no one is buying.