Big decrease in Google AdSense Revenue

[LynneTao]

I am suffering from a big drop (about 25% - 35% drop, up to 45% drop rate, based on the same impressions) on the AdSense revenue.
The Impression RPM reduces from average 3.8 USD dollars to 2.6 USD dollars.
More oddly, the clicks increased, from average 845 per day to average 1040 per day.

Anyone else encountering this issue?

[IanTurner]

It's the post Christmas fall in ad spend, the first couple of months of the year aren't known for consumer spending.

[silentneedle]

Much campaign expiration dates are are set to 31. Dez., that's why almost everyone is seeing a drop in revenue.

[LynneTao]

Thank you for your reply and explanation.

[tangor]

@LynneTao ... I'd like to welcome you to Webmasterworld!