AnswerMan has gold this time—how ratings aren't relevant to most anime aired in Japan (long-runners excepted), since they're super-late at night; the advertisements are for other shows by the same producer; most people record/stream them; the real money for the anime comes from home video sales.

https://www.animenewsnetwork.com/answerman/2018-06-25/.133369

I'm sensitive to this because I feel bad that my favorite shows get a few pennies of my Crunchyroll subscription, so I tend to buy Blu-rays and donate them to the library.