1B views=5M$ is an approximation to first order. I'm sure I could be convinced the CPM is off by a factor of 5. However, there's got to be a fairly hard minimum sales/month for an IPO: I didn't know it was $60M/year.

If your goal is to form a business that will make the founders rich, it's good to have some numbers floating around in your head. Maybe I was the only one, but I didn't have these numbers in my head, and I felt they were educational :)