Online illustrators are people who create visual images to communicate ideas and stories. These ideas and stories that they communicate with others are what brings other people in depending on how good their work is. If the illustrator made something nice for someone another person could ask that same illustrator to do this or do that and if they make it how they like it they would then become that person's illustrator and get paid more. Illustrators have to try and do the impossible which is to communicate with the person who wants something to be displayed on a website or software and they have to make it the way that person likes it for both of them to be happy.