A recent article on Adotas suggests that advertisers have yet to capitalize on opportunity in the long tail. "There's clearly a big opportunity, but it hasn't been seized," the article says. "The big fear about the long tail is that the quality is not up to par with what's inside the top 100." Adotas says that advertisers also fear the trashy nature of the long tail sites in general, such as download sites or link farms. However, Adotas argues that "high-quality content is out there, produced by professional writers or amateurs who are experts in their field."