Curious, how do you know they do not health test or do anything with their dogs? I don't believe you know the breeder....just because they are breeding a non-standard color, and you don't think they look like a Pug, they aren't doing things and are a BYB?
What do they do with their dogs? Conformation is obviously out. Obedience? Dock diving? Agility? Weight pull? Tracking? Anything? Bueller? What do they health test for?
It isn't that I just don't think they look like purebred pugs, it's that they're not. I've met purebred pugs that don't look like purebred pugs but they're still purebred pugs. Your dog isn't a purebred pug.