Comment by quotedmycode

Considering that they don't have a job, and thus have more free time to contribute shouldn't make them look bad. I have a job, I do my job, I go home. Occasionally (like on my birthday) I donate some of my spare time to projects that I care about, and you'll see contributions for a while then I get back to regular stuff which isn't open source. If that looks bad to a potential employer then that's not the kind of employer that I want.