That usually means you tend to visit trash sites. Higher quality sites have higher quality ads. In fact, for the highest quality media, people actually PAY for ads. See things like Vogue September issue or technical shopping magazines, which earn value for being 90% ads. People used to buy local newspapers because of the ads as well.
Yes, as Fall/Winter clothing is sold starting around September, and fall/winter apparel are generally the more expensive than spring/summer clothes, and so more advertising dollars go into it.
