I think that multiple sites would definitely help getting more readers and viewers. Maybe you want to consider having one main site where you post all the pages of the comics and posting a small prologue or something on the other sites? That would lead those who are interested to read more to your main site. That way, you can gather all your fans in one area. I believe that would be a better option if you want to hear what your fans have to say, since the comments would most likely be situated in only one area
yes, i was thinking of posting it on multiple sites to get more readers. :3 more so just dA, Pixiv, smack jeeves and our blog. but i was curious to see what everyone had to say ~ thanks for your input btw!