

Looks like this is a list of manufacturers that allow bootloader unlocking. If you want to install a custom ROM, you first need to unlock the bootloader. Note that carrier branded devices of these brands may still have a locked bootloader. The example I’m most familiar with is the Verizon version of Pixels… I always by the carrier unlocked version of the Pixel to ensure an unlocked bootloader.
Hard disagree. If you ask people to make a temporary change that still feels achievable, they’re more likely to at least give it a shot, and many of those people will spend some time considering alternatives. Once the week is up, some people may even choose to continue boycotting Amazon, or at least reduce their spending there.