Quite an interesting piece about click through rates on social media ads by day of week - do while users are on Facebook all week, Monday- Wednesday are the best for CTRs. But I do wonder how much that is effected by what day of the week campaigns go live on?
http://vitrue.com/blog/2009/09/08/vitrue-srm-findings-social-click-through-rates-for-facebook-are-highest-on-tuesdays/
