Ad campaign companies prefer to stare at them, take the words or graphics of the ad slogan they want to make, and customize it onto the mask. In Canada, customized logo masks are relatively rare. Canadian companies have customized activities that would otherwise make their campaigns more effective. Being printed on the mask will be seen by many people.
This is a customized logo for Canadian and American film companies.
They chose a black mask to customize to make it look more obvious.