When the bulk of the ads showing on your site are from advertisers whose sites are Made For Adsense Arbitrage. They make their money by "buying" traffic from you for a cent or two per click in hopes that the people will click an ad on _their_ site that may be worth a bit more. They make their money by volume.
That is not true. You can sign up for an ad service like Adtoll, sell ads directly, and set your own prices. Adsense is not the only ship in the ocean, and its not "the" only way to make money on the internet.
how long you are experiencing change,,keep log of ads showing on ur pages,,make sure the ads are relevent to ur niche,,
From three days its getting lower.. ads are relevent,but don't know whats wrong.. my site is there on my 1st signature.
If all of you actually believe that you get 70% or more revenue share then you are deluding yourself. These figures are skewed massively by huge partners who probably negotiate 85% rev share and account for massive amounts of these earnings figures. My opinion is that we, as standard adsense publishers, probably get 50% revenue share or less.
Check out the links in my sig.... (and consider starting your own thread rather than hijacking this one)