It's about being nice and about some being very good artists but it's also about the e-bots! "This notification is to make you aware that one of your favorite artists, XYZ, has uploaded a new gallery image. You may view this image by clicking the following link:...." People, who are on many favorite artists lists, get a lot of comments in very short time after uploading an image, because you just have to click the link in you mail, comment and that's it. It's much more time consuming to browse the galleries and view and comment images. I've seen some very good pieces, that had only the few comments by viewers who had found the image by chance. They surely were not on many favorites lists.