I am afraid that using Adsense in my site could affect my yahoo, msn SERP. (If I am yahoo / MSN why would I drive traffic to a site that promotes my competitors business).
Just bringing two places down on SERP will hurt more than 30-50% of business.
Same with using YPN. Google might downgrade my sites results.
Anyone know for sure whether this is not the case?
(still I am skeptical. Probably you will receive more traffic if you drop ad sense. But then what is the use of extra traffic if it doesnt bring some revenue..)