I think people forget that cross breeds were the beginning of the purebred horses. All horses did not begin off as 'purebred' horses. The 'Quarter Horse' did not just appear out of thin air. Cross breeding had to happen for a new breed to be made. Blazers are a real horse, a real registry. Just because they are little known does not mean it is a scam. Granted, the Blazer breed has not been around long, and has not been refined completely because there are a lot of horses born that are 'blazers' that don't have the breed criteria, but that is just a matter of time.
I think everyone is jumping ahead of their selves.
Oh, and 'designer' dog breeds are real dog breeds that can be registered. Labradoodles and so on. They are not 'MUTTS', they are a designer breed.