Making adsense compete hurts my CPC earnings

[JS_Harris]

Adding an adsense competitor's ad to web pages seems to make the Adsense CPC rate chunk downwards, hard. Traffic remains the same, number of clicks, pageviews all unchanged, but average earnings per click is seriously brutalized.

Is anyone else testing or seeing this happen?

edit: This competitor is routinely used on the same pages with adsense, it's allowed by the TOS of both companies.

[Runfun]

Advertisers or networks have more options to deliver the ads. So in your case you're not letting Adsense compete with the competitor you give advertisters the option to serve through the cheapest ads. I recommend using Ad Manager but most here only focus at Adsense and complain ;-) [webmasterworld.com...]

[Steven29]

Could the additional network be adding lots of additional requests per page load, maybe even having lots of javascript causing 100% cpu usage or similar? Some networks load hundreds of files! This could have a major impact on the in_view range and even possibly the cost per click. Have you tried lazy loading or setting the priority lower for the second network?