Amazon created a whole ecosystem based on the Open Source Android
Google, can reasonably argue that other vendors are able to create a Google Free Android, because Amazon have done just that. Amazon's Fire devices don't work properly without Amazon proprietary code, just like Google's Android devices. Apple also bundle a set of proprietary apps with iOS, and I have to admit that, personally, I don't have a problem with the creators of a platform installing some proprietary software for free - I don't have to use it if I don't like it.
Maybe the Brexit campaigners could use this as a USP for an independent, data haven, for the likes of Google, Amazon et al?