What was the other option?
Rasty Turek
31

Here’s one

“Specifically, we extract users’ email addresses from GHTorrent, look up that email address on the Google+ social network, then, if that user has a profile, extract gender information from these users’ profiles. Out of 4,037,953 GitHub user profiles with email addresses, we were able to identify 1,426,121 (35.3%) of them as men or women through their public Google+ profiles. We are the first to use this technique, to our knowledge.”

http://arstechnica.com/information-technology/2016/02/data-analysis-of-github-contributions-reveals-unexpected-gender-bias/

or not doing transphobic studies of questionable statistical methods with data that is not legal to use so no one can verify them, that impose a gender binary
*shrugs*