Monica immediately answered Mariella's question.
[In this case, the evil companies won't get a lot of leaking energy from the collapse of the world but if they can invite these nourished protagonists to join their companies...]
These protagonists could go to another world either using their own body or just with their soul.
Then, they could take over more newly born novel-bound worlds, changing the focus of that world to them or to the companies behind them.
[This is the evil Gods and their evil companies' way to force people to be their followers.]
If they could control that world's consciousness and instill many religions or beliefs belonging to them...
It was the same as farming followers.
[These Gods used an extreme way to gain faith and energy.]
The enemy also had a similar company like Monica's but the hosts were all ex-protagonists and the systems were people they kidnapped from various worlds.