January was the month when Adsense earnings for my new site really took off (some important sites linked to mine). For the first two weeks of January Adsense earnings were astounding and I was in heaven — planning a vacation, maybe an addition to my house. But for the last two weeks of January earnings have been only about half of the first half of the month.
Is this a normal pattern? Have others noticed this?
(P.S. my site is of perennial interest, not affected by season, news, TV schedules, etc.)