[benhurmarcel]

>It's for access to […] their very large user base

Pretty ironic for a company that sells you that you're not the product being sold.

[musicale]

To me it seems more like paying for shelf space, and iTunes is probably a lot cheaper than what you used to pay for physical shelf space. However, physical games (and downloads) for the Switch (or other game systems) cost a lot more than 99 cent games for the iPhone and iPad.

But Apple does sell paid search/advertising results.