Earlier quoted context omitted.
Steamdb[1] gives some info on concurrent players, but only estimates for owners. Looks like they estimate number of reviewers between 5-15%. [1]: https://steamdb.info/app/1404560/graphs/
5-15% is in line with for example anecdotally observed view count vs votes on videos on YouTube. So based on that I am not surprised that video games on Steam can be expected to have a similar number of reviews relative to number of owners. Typically I expect a video on YouTube to have about 10% votes and about 1% comments. Do all reviews on Steam need to include text or can simple thumbs up/down be given without any…
this is known as the 90-9-1 rule: https://en.wikipedia.org/wiki/1%25_rule_(Internet_culture)