But not all crummy behavior, right? Things like ad-infested basic apps might be discouraged even with the $99. I am talking about apps like tip calculators, daily quote apps, and very basic games like slots that have no chance of being monetized well beyond ads.

What is discouraged is the solo devs making their first apps and the solo devs in poorer countries (but Apple lost those markets anyways). The scams and the useless apps have no problem paying a single 99$ bill.

Will Apple stay pay out the scam money if they ban you immediately?

They don’t ban you immediately.

They could hold funds for new unknown developers for 60 days for good behavior. During this time if you get banned they should seize the entire proceeds to refund to their users.

This would be great but in practice they'll just use third-party ad networks, which pay regardless of Apple's decision. It'll definitely break those pesky inflated subscriptions though.

How about $99 to register plus $10,000 fine + 100% of proceeds of perfidy + termination for certain misbehavior + mandatory presence of someone company or individual present in a country willing to enforce such a provision.

If you want it to really stick make them buy a bond against in such a jurisdiction. After one party has been burned for their 10k they'll find their former partner exceedingly aggressive in recovering their money and none willing to do business.

Furthermore most of such abusive behavior is trivially recognizable based on dollar figures involved, behavior, organic reviews, complaints. In this day and age there isn't much excuse for a trillion dollar company not to have automated 99% of the situation and employ labor to handle the rest.

Can companies actually enforce "fines"? The closest I can think of would be a "breach of contract" penalty, but you'd still have to go to court of file small claims for that. I don't see Apple getting into any of that to improve the quality of the App Store.