Here via yin_again, too. I did that once for a long story, broke it up into six sections and posted one section a day for four days straight, then posted the last two on the fifth day. And after seeing this post, I had to think back and reconfigure why I did it. It was on a high-traffic bulletin board, which is different from LJ, I think. This was the SciFi bulletin board, back about five years ago; there was a limit on the size of individual posts, and a post didn't get bumped up if a new comment was made to it, so stories would disappear from the first click-through three pages after a day, never to be seen again. It wasn't about prompting more individual pieces of feedback, but I guess in a way it was making sure more people saw it.