There’s no secret that different types of websites attract different levels and types of advertisers – but the variance is rarely elaborated upon. For instance, Facebook’s top 100 advertisers spend $49,045,000 per month, while the top 100 advertisers of IMDB ($7,217,400), CNET ($3,094,000), and NYTimes($7,128,500) combined spend about 1/3 ($17,740,000) that of Facebook. This of course addresses the levels of ad revenue by popular sites, and is just one of the findings from the most recent Nielsen AdRelevance report. Of special note are AT&T’s spending trends, and the rate at which this brand has invested online, especially in the four sites included in the study.