I don't mind people saying to me in my private messages, "hey check out my comic" because I know they must be eager to grow an audience. I strongly dislike when they do it in the comment section. I feel like: a) my comic is not important enough for them to comment something about my plot, characters, art, etc. and they are just there spamming. b) Many times those comments sounds like readers should stop reading my garbage and jump into a better comic.
As a reader I am most likely to visit a comic if:
-The cover and description are eye catching.
-The comic recommended by creators I love.
-The author make a very funny/nice comment on the forums or in the comment section of another comic.
-The author have a pretty profile picture with nice art.
-The author and I communicate and become buddies! -
-The author seem genuinely interested in other people's comic and eventually recommend their work. Like, "wow I can relate, I have a character just like yours". This seems more genuine and less desperate. Out of curiosity I would want to check that out.