What about rules like the below on Android? (or Chromebooks where you cannot even install alternative native applications)

> Devices may only be distributed if all Google Applications [listed elsewhere in the agreement] ... are pre-installed on the Device."

>The phone manufacturer must "preload all Google Applications approved in the applicable Territory ... on each device."

>The phone manufacturer must place "Google's Search and the Android Market Client icon [Google Play] ... at least on the panel immediately adjacent to the Default Home Screen," with "all other Google Applications ... no more than one level below the Phone Top."

>The phone manufacturer must set "Google Search ... as the default search provider for all Web search access points."

>If device owners hold down the physical “Home” button or “swipe up” from a digital home button or navigation bar, such actions should trigger Google Search.

>must provide access to a “collection” of 13 Google apps (Google Chrome, Google Maps, Google Drive, YouTube, Gmail, Google+, Google Play Music, Google Play Movies, Google Play Books, Google Play Newsstand, Google Play Games, Google+ Photos and Google+ Hangouts).

How is that not "rammed down your throat" ?

Or do you really think Android users are "voluntarily installing" Google Play Newsstand?