Maybe because it's really a pretty mediocre phone? Aside from the Crackberry forums, it hasn't been reviewed very well by anyone. Look at ARS Techica's review, for example.
The one entitled, "
BlackBerry Priv review: Android fixes the OS, but the hardware can’t compete: $700 for a bad keyboard, poor camera, iffy build quality, and old software? No thanks"?
http://arstechnica.com/gadgets/2015/11/blackberry-priv-review-android-fixes-the-os-but-the-hardware-cant-compete/
Here's what I got out of the review:
Build Quality:
Terrible ("You can hear plastic scrape against plastic when you open or close the device.")
Build Materials:
Terrible ("It features a spongy back material that feels like a plastic frame with a rubber skin wrapped around it.")
Build Design:
Terrible (poorly curved screen, pointless mute button, fake speaker grill, MicroUSB, slide out keyboard)
Keyboard:
Terrible ("The slide-out keyboard feels like the Priv's entire reason for existing, but it just isn't any good. BlackBerry's hardware keys might have had a leg up on 3.5-inch devices, but today the keys are microscopic compared to the software keyboard on any 5-inch phone. The tiny keys make it easy to press the wrong button, and typing becomes a cramped, uncomfortable experience.")
Software:
Outdated, branded and dirtied
Picture Unlock:
Terrible (Too sensitive, slow and prone to errors)
Camera:
Absolute Garbage ("It's especially bad for a $700 device. In our camera test it was absolutely wrecked by the $380 Nexus 5X")
Processor Performance:
Decent. Pretty close to on par with the Nexus 5X
Battery Life:
Decent (with screen on low brightness, not great)
Pricing:
Terrible ("...pricing your Android phone at $700 is a boastful statement that you've made a kick-***, no compromise device. The BlackBerry Priv can't back up that kind of bragging, though, and that's why it's a failure. Other than the subpar keyboard and camera, everything on the Priv is merely passable. It's a "C" student, but the price demands we grade on a curve that flunks the Priv.")
Overall:
Do Not Buy ("Maybe BlackBerry will convince some enterprise customers to buy a few Privs for their business, but for normal consumers, there is nothing compelling here. The Nexus 6P has better specs, a better camera, an aluminum body, and stock Android with updates direct from Google. It's also $200 less than the Priv. There is still no reason to buy a BlackBerry.")
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Moving away from their review, the other things that are important? Screen Quality? It fails. Being able to buy and use it on your carrier? It fails.
All of that said, there are still several users with BB nostalgia or that sincerely appreciate the features that BB brings and even Russell for Android Central did a relatively positive review of it (he likes it a lot, but it feels like he likes the concepts more than the execution). This isn't the worst device ever made by any stretch of the imagination, but it is far from the best. And it is really hard for people to swallow the fact that there are at least 7 better devices (so far named in this thread) available for less money and with far fewer compromises. If BB wants a to do list of things to fix for 2016, this post may cover it. That or they can release the same mid-range phone at a low to midrange price and then we're having a slightly different conversation about the level of expectations.
http://www.androidcentral.com/blackberry-priv-review