Apple doesn't use a similar model, they use the exact opposite model. They sell content at minimal profit to enhance the ecosystem for their devices, which they make a very tidy profit on.
It's still pretty true for the App Store. Apple hit the $2B paid out to developers mark early this year, IIRC, which means about $1B of revenue for Apple for the entirety of the App Store's existence. Their latest quarter saw nearly $30B revenue, so it's still a pretty tiny part of their business.
