There's no clear answer to the question. I'd say everyone has their own objective. Some might do it because they're used to that dynamic, meaning they talk about a specific topic they like and don't want to stray from other subjects.
I'm just saying that as long as the person does something new every day, for me it's not abuse. That's my opinion. Let me give you an example: suppose someone uploads fan art every day, that is, a drawing.
The theme would be the same, that's true, but each drawing is different. In many cases, it involves effort that isn't visible in the post. There are also others who write stories and things like that. All the stories are about the game in this case, but each one is different.
When could it be considered abuse? Well, I would only consider it as such if the drawing or story is recycled.
But as long as they don't reuse the same content, it's legitimate. We can't demand perfection in a world of imperfect people.