It’s less about individual small screenshots (PNGs for example are pretty large with real photographs, which can take minutes to load with a bad connection) and more about multiple images on one site. User retention is strongly affected by things like latency and loading speed. The best way to improve these metrics is to reduce network traffic. Images are usually the biggest part of a page load.
Shart is your first romance, when your options are her (who is more or less ambivalent towards you at first) or the frog (who fucking despises you). Of course people pick her while they don’t know about Mommy Karlach.
Second playthrough you know there is someone better waiting for you out there!