The key here as in the U.S. @roadstories is that if a business offers a franchise for someone to come in and join their brand, the primary business must set rules for all people who want to open restaurants under their brand. If not, then you won't get the original taste the primary business is known for. The new stores in essence operates as if they are their own brand or competitor. The fault lies with the primary business for not setting rules.
Then sometimes what can happen is the franchise business employs less qualified people to work at their branch. These individuals don't follow the recipes; therefore, you get a different taste. That has happened to numerous brands. A customer soon learns the different branches that are not up to par as far as the original taste. Some can have a drier taste or not the right amount of spices. I have left franchise businesses for that reasons I mention above.
Finally, a primary business can sell it's franchise name. The customers think they are getting the brand name, when in fact it's an entirely new taste and menu. They're just using the name.
At least this has been my experiences. Thanks for sharing. Take care and have a good start to your weekend.
!lady