It's a fair point and I hadn't seen anything about League before this article. I explore some observations based on manipulating the graphs down thread in the c

It's a fair point and I hadn't seen anything about League before this article. I explore some observations based on manipulating the graphs down thread in the comments, and make a similar point that observations which are surprising may be more reflective of the population using the app specifically. Having said that, a quick google for any comparable data set doesn't seem available. So while the limitations are important to keep in mind, for now, this is the only data set that I'm aware of. My approach is to take it with a grain of salt, but not to completely ignore it.