I still can't quite get your logic here. Why would a company who sells petrol/ gas care what kind of car you put it in? Oh except for the total world domination theory that some seem to be able to detect from daz. Albeit with nothing but intuition.

Back when they introduced the Kindle, Amazon, to absolutely no one's shock, except possibly to those who have a hard time understanding why anyone would do it, sold ebooks in the proprietary AZW format...which was only available on the Kindle. In order to read Amazon's content on an ebook reader, you needed to do so on a specific device, which coincidentally enough, was only produced for Amazon.
So tell me, why do you think that Amazon, which was selling books (aka, the gas) tried to make it so that it could only be accessed on one particular reader (aka, the car)? According to your understanding, this sort of thing is entirely incomprehensible.

The reason why, of course, was that Amazon was in a position to be able to try and pull that off. Their brand name and online presence immediately gave them a huge leg up when they started selling ebooks, which weren't a huge market at the time, and so the Kindle was an attempt to look people into Amazon by hardware and content. If you wanted to buy an ebook from Amazon, you needed a Kindle. If they could sell enough Kindles to dominate the market, then people when people thought about buying an ebook reader their first thoughts would turn to a Kindle, and if they bought a Kindle, they'd be pretty much locked into Amazon and Amazon's format and Amazon's digital rights management.