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.
I just finished "Your Lie in April" anime and loved it so so so much that $130 dollars are firing lasers at my pants pocket, wanting to fly to A-1 Pictures/Sony and its backers. $130 *per* *set*, and there's *two* sets for the whole series.
(And no, I won't buy the Asian DVD boxset.)
Maybe I'll buy the manga, even though it's the anime I'd really like to support.
First world problems :).