Where does Quantcast get their data?

The first thing you learn in the data business is that all data has biases.

But sometimes data biases are easier to spot. I’ll let you play “Where’s Waldo”
with the screenshot below and find one particular data bias that Quantcast has:

gigaom.com (rank 5,658) - Web Site Audience Profiles from Quantcast.png

Clue: it’s not CraigsList or Sears.