One thing though: I’m likely not to stop and consider looking closer at an app if I can’t judge if it’s going to be what I’m looking for. I’m not going to go over random GitHub repositories and create screenshots for their projects. So if the assumption is that the user contributes screenshots I don’t think it will ever change anything for the majority of projects.
I’ve been told that Artemis Fowl in the books is actually a nice and smart person. In the movie he comes across as an arrogant dick for a larger part.