Apple does not allow for this model.
EDIT: Apparently during the Xbox 360 days, that was ~20%. Couldn't find any newer numbers.
It's how consoles are sold at a loss, but make it up through game sales.
Microsoft receives a fee from developers that participate in their licensing program, which is generally a royalty on each sale ranging from 1% to 30% depending on the negotiating leverage of the publisher.
Developers are not required to participate in that program to sell games/software for the xBox, and some don't, but MS doesn't guarantee that any unlicensed software will work with the current version of the system or any (software) updates to the system.
The same is true of Sony as well.
They may not be required to take part in the standard distribution licensing program, but instead have the option of participating in ID@XBOX, where the games still have to be certified by MS to be allowed on the platform. This program also seems to be exclusive to digital distribution and smaller indie studios.
In the end MS is still always in a position to take revenue cuts for access to their platform, and mostly exercises it.
They also prevent other digital retailers from selling on the XBox which is very relevant for in game purchases.
The whole thing is slippery mass of corporate worms trying to fuck each other over for market control and the only losers are the end users. I want nothing to do with any of them any more.
Microsoft takes 30% of IAP.
Whether it's bought in a store or not is irrelevant.
It's no different to the iPhone at all. It's just less controversial because people think of their phone like a mini computer but always expected consoles to be closed.