Everything progresses, When Boxing first came along the only way you could see a fight was to be there. Then came radio, then television, then satellites which gave us closed circuit which gave us PPV. Like every progression PPV is going to have it's day and each progression overlapped with the previous progression. The latest progression is the DAZN model and to a lesser extent ESPN+. You pay a set fee per month or year and you get all that promoters fights. PPV is on it's last legs. Just a quick word on PPV popularity. It's estimated that 100 million people saw Ali vs ,Frazier I, Ali vs. Foreman and Leonard vs Hearns. True story, when Ali and Frazier were working out the deal for their first fight the promoters Jerry Perrenchio and Jack Kent Cooke gave Ali and Frazier two options. Option number one , each fighter gets 2.5 million or Option two, both fighters get one million plus ten percent of worldwide closed circuit. They took the 2.5. Both Ali and Frazier said that it was the worst mistake they ever made.