The filthy casuals write positive reviews on steam and it's clear that true gamers won't even try to review such a shallow game.
reviews/ratings because only those already inclined to like it (or who have been swayed by the already positive reviews) will bother buying it and (therefore) bother reviewing it, hence amplifying the positive ratings
Unfortunately, this probably means a death knoll for this gem, at least I predict it will contribute to its slow trajectory towards insignificance/unknownness/lack-of-users.
Why? Because it is already the less popular option in this comparison: https://ruby.libhunt.com/compare-premailer-rails-vs-roadie-rails
and being actively maintained is an important factor in evaluating competing options.
So of course people will see that the premailer option is the option that is still actively maintained, is still continuing to be improved, and they'll see that this one has been relegated to dormancy/stagnancy/neglect/staleness, which will only amplify the degree/sense of abandonment it already has from its maintainer (only now it will be its users that start to abandon it, as I now have).
This is a by-product of the success of Ubuntu. Whether people like it or not, most software available for Linux will target Ubuntu first. There may be packages available later for other distros / systems, but on the whole, you can be sure a software developer will target Ubuntu if they target Linux.