My first advanced RP back on oldguild I spent probably 12 hours catching up on the plot, reading the posts, making a character, then 3-4 hours per post. I got 3 sentences directed toward my character over 4 posts (The average post length in this RP was 2-3 pages). I said lines toward 5 different characters in that time and made so much effort to interact to just get ignored. Eventually I just stopped posting in the thread and no one seemed to even notice. I stopped RPing for about 6 months after that, and haven't touched advanced or joined any long in progress RPs since. Yeah, getting ignored sucks. It really gets under my skin when I see it happening.