If your going to work for one shop then you should support their brands. If your contracting yourself out to various different shops with different certifications, then I guess you’ll be doing as you please since you answer to no one. If a shop doesn’t like it then they can hire another instructor. Personally, Aikidiver... I support the concept of helping to support your shop, after all it is a business, their shop, their rules :) I was in agreement with your responses.