A discussion of potential sampling bias is missing - the data seems to be entirely based on the usage statistics from their IDE plugin. Are their users represen

A discussion of potential sampling bias is missing - the data seems to be entirely based on the usage statistics from their IDE plugin. Are their users representative for the whole population of developers? I could imagine eg that time-constrained devs might be more likely to install the tool than people who are happily coding away most of their working hours, but I might be wrong.