Gmail - Flag Football

Gmail - Flag Football
Gmail is awesome right? Sponsored links are nice. But 'Related links are better'. Womack's black socks reference, perhaps combined with flag football, gave me three links, two sponsored, one 'related'.
Two for socks websites. Stupid for me, probably good for Google. But here's where I was surprised. The 'related' link was about the Raiders' performance in the last football game, & how many sacks they would get. Is this because of 'flag football' AND black socks, or just a coincidence that Raider Nation wears mostly BLACK?