It's not about shady or below board. It's about the fact that they can, at their choice, remove books from people that have paid for them. Since they have this

It's not about shady or below board. It's about the fact that they can, at their choice, remove books from people that have paid for them. Since they have this power, and can (effectively) use it without repercussions, it's now just a question of under what circumstances are the people in charge willing to use it. It's the same as when government agencies are given broad, sweeping powers with the explanation of "it makes it easier to do the right thing, and they won't use it to do the wrong thing". Only, the person that gets to decide what it gets used for can change. Then suddenly, they _are_ willing to use it for the wrong thing.