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.
I heard that sites such as Prime Dice makes well over 1,000 BTC (7 million USD) a month. But they struggled a lot during the initial days and spent a fortune on promotional campaigns and bounties before rising to the top.