Seventy percent of consumers said they were unlikely to purchase from, or even return to, a website that has pop-up advertising, registration log-on pages, software installation, or slow-loading pages, E-Commerce Times reports (via MediaBuyerPlanner). A study commissioned by Hostway, a Chicago-based Web site hosting service, found that approximately 35 percent of visitors to commercial sites said pop-up ads were their number-one peeve. More than 24 percent of the respondents said they were extremely or somewhat likely to complain to the company when they were exasperated by a site.