Along with some friends of mine we managed to find the sources (up to debate, really) to four out of the five Steam reviewers that can be found in the game. I attempted to recreate them with the original images to the best of my ability. Unfortunately we haven't been able to find SpunkyMunky2697's picture, so if anyone has any knowledge about that one it'd be incredibly appreciated, for the meantime they'll just have to deal with being displayed with an "upscaled" version.
Buglivia
Nudelschaf
Cookie9
SpunkyMunky2697 (Help.)
MotoringGuy76
I also included the profile picture of those blurry reviews because why not?
Hope you guys find these fun and interesting. <-- Also, User Reviews was overhauled recently, which I'm quite proud of, in case one happens to be bored and has nothing else to look at for a minute or so. ☝️