To tell you the truth, this is a phenomenon that is unique to the Canadian francophonie—in other words, the Canadian star system. It leads to the success you referred to. Out of the 50 most watched shows, 46 are Canadian; that is the figure I use the most. It is very much based on the strength of that star system.
As for Bye bye, that show was watched by over 4 million people. While the end of linear television has been predicted for a number of years, those ratings are still the highest ever recorded for a show in French in Canada.