Parece que ya se ha solucionado y Google ha respondido con lo siguiente:
Dear publisher,
Thanks for reaching out. We appreciate your concern and honesty about this issue.
Beginning April 19th, some publishers have been impacted by a new segment of invalid traffic. Fortunately, Google’s traffic quality systems were able to react quickly, detecting this traffic as invalid and treating it accordingly; however, for two days this was not reflected in estimated earnings.
This invalid traffic will be removed before finalized revenue is reported at the end of the month. As a result, publishers may see a larger than normal difference between estimated earnings and finalized revenue for the month of April 2015.
This invalid traffic is no longer being counted toward estimated earnings as of April 21, 2015. Since Google does not block this traffic, publishers may continue to see it reflected in their weblogs.
Advertisers have not been charged for this invalid traffic. If you notice an issue like this in the future, please submit this form to our traffic quality specialists.
Sincerely,
The Google AdSense Team
Por unas horas me había ilusionado con el aumento 🙁 jaja
Saludos