Party's Bonus Bonanza

[FishBurger]

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So now party says, O.K. We will open up that game and let you pay out under us as well. They start this agressively after they see the impact empire has had on them. They realize that players are staying at the second site they signed up for to get the rake back and use their party accounts for bonuses only.

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I'm confused. Empire is a "Party" skin, right? So each different "Party skin" is run by a different company? What is the overall business model? Does one company own the software, host all the players, and lease out the software for customization to the "skin" companies? Do the "skin" companies then compete with each other for players?