TV/Cable News Wednesday Night Is ROI Night For TV Advertisers By RBR-TVBR - August 29, 2018 0 FacebookTwitterWhatsAppLinkedinEmail Sunday night may have the largest TV audience, but Wednesday night provides the best return on investment for advertisers, according to C3 Metrics. Thursday is a close second and is the best night for major movie studio advertising ROI.Please Login to view this content. (Not a member? Join Today!)