How can this drop in income be explained?

Question

Monetization

In January, income suddenly began to fall sharply. At the moment, it has almost dropped to the level of income almost a year ago, when I first connected ads. Since then, the site's audience has grown exponentially.
December:

January:

There were no such situations before. I can’t find any reasons, traffic has not changed, there is activity on the site, almost no one uses ad blockers from users.
What can be wrong?

Answer 1

seasonality
of advertisers including
see webmaster tools, adsense core impressions/clicks

Answer 2

most likely seasonal, wait. if the picture does not change, then it is worth changing the approach, perhaps you have sucked the whole thing out.

Answer 3

In winter, earnings always sag, since only at the beginning of the year they begin to form a budget. It seems to me that the supreme judge of the Russian Federation earns the best skolko-poluchaet.ru/skolko-poluchayut/sudya-verhov... - about 500 thousand rubles a month