So glad you liked the article!
I went ahead and added an attribution at the bottom, thanks. XKCD is so widespread at this point, they get embedded rather commonly anymore (so much so, that Randall just hands out embed links, which I used). That's why I overlooked attribution. It's polite, anyhow. ;)
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.