In my opinion, the actions taken were correct.
It's not a real e-book and it should not be used to charge people.
As a community, it is crucial to help ourselves, and others defend themselves from scammers.
Charging a price to guide users for "prevention" against scammed is disgusting. (I put prevention in quotations for a reason)
In fact, the information stated in the e-book according to the dispute is shared across our community freely, and can be accessed freely from PayPal's FAQ, etc.
It's like saying: "Hey, don't want to get scammed? I'll teach you how for a price"
You may say that "business is business", but you have to keep in mind that in business, there are also ethics.
In the markets, some of us lust for profit, but it doesn't necessarily mean that some actions done are ethically right.
Without a doubt, it won't be allowed.
Reason: Ethically wrong. Doesn't matter what your excuses are in the e-book.