Correlation doesn't imply causation - stackoverflow tabs Vs spaces

A week or so ago the very clickbaity titled Developers who use spaces make more money than those who use tabs was syndicated on Hacker News. It’s nice to see a "correlation doesn't imply causation" rebuttal response to this by Evelina Gabasova

TL;DR: The combination of open source contributions and version control system usage accounts for at least some of the difference in salaries between tab and spaces users