I am not sure how much more to go until 100%, but I will explain possible misconceptions. I am a 16 year old kid with no hobbies in the middle of a war who really likes indie games and began rating every game I played since 2017. All of the ratings are genuine and not paid, I have played through each one and honestly think they deserve the stars because, that's just my taste. I am hoping the itch algorithms will bring the lesser known games to the public and the games will spread exponentially to reach people's view, but it seems not. 

itch.io never ends, no escape

Try putting the games you like in collections, those show up in searches and probably help more to make games visible.

I think it's asking too much to increase the visibility of a game with a single star rating. What you are doing, however, is giving the devs of a game you enjoy a reward for having put their time and effort into it, which is something we all appreciate, especially when we're starting out, and I wish more people would take the time to rate games, and leave helpful feedback :)