As you're probably well-aware, the only way you're going to get your hands on an easily-unlockable Motorola phone is going the Developer Edition route, as Moto has locked down the bootloaders of all its other handsets. And until now, even if you purchased a developer edition phone that Motorola explicitly advertises as having the benefit of an unlockable bootloader, Motorola would still void your warranty if you requested an unlock code.
It's no secret Motorola has left a bad taste in customers' mouths over the last couple of years. Cancelled OS updates and broken promises have understandably left many owners vowing never to buy a Moto product again. Who can blame them, really – when purchasing a device, it's not unreasonable to expect good support moving forward. Unfortunately, that's just not something Motorola has been able to deliver on in the past.