I know that when I finally started communicating more in the forums, my views skyrocketed. I don't know if doing so BEFORE I started posted would have made a difference, good or bad.
I also know that posting "works in progress" can lead to you losing some potential readers. They're going to associate your comic with an incompleteness, and we all know making comics is hard, and your incomplete pages might be the only thing you post for a long while.
For my comic, I just waited until Year One (basically season one) of my comic was complete before I started posting, advertising, or anything.