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Wait so when someone typoes cnn.com as con.com, that is ipso facto a memory error? I guess I could see that if the characters are radically far apart on the keyboard? But doesn't a simpler explanation like "one person out of billions with Internet access typed the wrong thing" seem a lot more likely?

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Domains that are only used as CDNs, like cloudfront.com, are almost never typed into an address bar. Errors in the domain name are more frequently the result of a bit-flip error.

This seems like a pretty weak argument. OTOH, 3% of the HTTP requests made to a bitsquatted domain in the linked articles had the original domain in the Host: header; those sound like actual memory errors.

Also, these typos are typically not easy ones since flipping a bit changes the letter in ways that are unlikely typos. With cloudfront.net an negligible number of people would be typing them at all. Close to 100% of the errors that I saw were loading either images, css or javascript files that some other page depended on.

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