Guys, many of you are over thinking the whole BL lock/unlock. Simplest explanation for VZW pixels, hurry and depixel8. Once your BL is unlocked you will have full control. Don't worry about OTA's you can always grab them from Google and flash via ADB. For factory images, if you flash the Google version, your ota update will be the Google one (depending if you have OTA's turned on/off), that being said if you have recovery or custom kernel than the ota won't take. Same goes for if you flash the VZW factory image. Like many have said we don't know what exactly separates the VZW/GS versions, but like other's said, likely CID or IMEI. Bottom line is if you have a VZW pixel unlock the BL ASAP, if Android pay is a must you can always use elemental's kernel. Note you cannot have root though.