Well that didn't take long. FireWater has already posted an image of a bootloader unlocked Verizon Pixel. So far there has been no mention of how this was achieved. It is likely that for now the process is not safe or user friendly. There has been no guarantee that the unlock method will be released. Apparently unlocking this bootloader was pretty easy. I guess HTC just left it wide open. I can image Verizon won't be very happy once the method is released.
via @firewaterdevs