I have a fairly large, popular site which usually shows a variety of well-targeted ads. Today, for the first time in 2 years, there is only 1 ad (the same ad) showing on all my pages. This ad is totally unrelated to my content. The adsense preview tool is only showing that same ad. It's hard to believe there are no more ads in my niche. Is anyone else seeing this? Should I contact Google? My earnings are taking a huge hit as a result.
Thanks
