It's not exclusive to any carrier - Microsoft are selling these, unlocked, to anyone who wants to buy it. They can then "activate" the phone on any network they choose. Hell, they're not even activating it, they're sticking a SIM card in it and the phone works.
The problem is that Verizon is an old dinosaur, using old stone age technology. CDMA? Really? The world moved on well over a decade ago. Parts of the world moved on well over two decades ago. Sure, the phone's hardware may support CDMA but it's not enabled, and my thoughts on this is below.
My take on this is; Verizon has historically been bad for Microsoft. Look at how they have treated Windows Phone in the past, they've historically taken all and every opportunity to screw Windows Phone users or force them into using a new phone.
The fact the 950's aren't supporting Verizon is Microsoft throwing a tantrum and purposely blocking CDMA in the Qualcomm SoC. The marketshare held by Windows Phone^W 10 Mobile is tiny in the US in the first place which means that Microsoft can easily afford to either, a) force Verizon subscribers to move to a different network or b) use a different phone/platform. It wont affect Microsoft's mobile marketshare either way, but it may "stick it to Verizon" like how they've done to MSFT in the past.
You might want to look up the specs again, because the CDMA specific ones are missing from your listing.