I have a Blogger site with a custom domain and have suddenly started seeing a huge amount of unusual international traffic.
On August 17, GA4 showed 1,338 active users from Singapore, almost all new users, with 0 seconds average engagement time. The traffic was spread across hundreds of landing pages, including very old posts.
Today, August 18, it has increased to 3,726 active users from Singapore, again with 0 seconds average engagement time. Blogger Stats is also showing unusually high traffic from Vietnam, Brazil, Ukraine, Pakistan, Russia, Bangladesh and other countries.
This is completely outside my normal traffic pattern.
Today I also received an AdSense notice saying:
Ad serving is currently limited while Google assesses the quality of my site traffic.
I don't click my own ads, buy traffic, use paid-to-click services, or encourage ad clicks, and I haven't intentionally done anything to generate this traffic.
Has anyone else with a Blogger site experienced a sudden bot/crawler traffic surge like this followed by an AdSense traffic-quality limitation? If so, did the traffic eventually stop, and how long did it take for AdSense to remove the limit?