That isn't entirely accurate. The Fire doesn't prevent you from installing arbitrary third party apps and app stores. It's just that it can't use the most imp

That isn't entirely accurate. The Fire doesn't prevent you from installing arbitrary third party apps and app stores. It's just that it can't use the most important one: Google Play. This is not entirely the Fire's fault. Play is no mere standalone app; it needs some hooks built into the OS itself. Installing it on the Fire is possible, but involves deeper magic than even the average developer can be expected to know. You can blame Amazon for not including that support (and I do), but you can also blame Google for requiring it (and I do).