And is it worth trying to recreate one? I would imagine it's already too saturated. Either way, I was mostly curious about how much these guys actually make (margin-wise). If anyone had some insight on this, I'd love to hear.
If you have no idea then you don't have to.
The crypto gambling industry is totally crowded today and if you are longing to start one of it. I don't have an idea on how much they are making of it. Giving you an answer for each of your question is unanswerable.