Very few modules are on Steam at present, but the audience there seems more willing to rate contributions.
For example, Enigma Island has had 797 unique subscribers, of whom 25 have now given a positive rating.
This is a magic number. Steam has a weird system whereby you get no rating at all until you hit 25, at which point you get four stars (unless there are negative reviews). 100 gets you 5 stars, I think. (For reasons unknown, my module has four stars on the ranking pages, but only 3 on the module page, despite having zero negative reviews - go figure).
I had thought that modules would struggle to get ratings (OC tweaks like weapon upgrades get far more subscribers) so this was a nice surprise.