jroeder handled part of your question correctly.  This is a customer populated forum.

As to your other comments...

NO carrier will promise an update.  The uproar if they miss the date is too great.  The best you will get is a date when the update is ready, then the update is rolled out gradually to some ESN numbers at a time.   Just because the update is released by Verizon, does not mean your phone will get first at bat.

Blackberry cut its own throat.  It didn't evolve with the times. 

Rather than go through the expense of making CDMA phones that they can't sell, BB isn't making them and Verizon isn't asking for them.   If you have followed the BB Priv, you know they released to GSM first and have merged with android to open up options and perhaps pull in android users (or pull back BB users that gave up and went to Android.  The Priv is BB last shot.  If it fails, it may be over for BB.  It may be too little too late.

JUst like the Passport, if it sells, they seem willing to make and sell a CDMA version.

I Should add, it isn't just CDMA, it's Verizon branding and custom software they add to almost every device for the network.

WIndows customers are are in the same boat.  They don't sell well.  The 950 XL is only sold through Microsoft.  The App Store is sparse and with Windows 10, even more barren.