I'm facing a similar dilemma. (Figured I'd just piggyback off of this thread instead of posting a new one on the same subject.)
I've got a piece that I'm looking for some feedback on, but it's a good 6300 words. I could post the whole thing, knowing full-well that I will likely not get any critiques, and if I do they're probably just going to read the first 2K words and review just that.
Overall I'm fine with that; sure I want critiques of the whole thing, but I have accepted the reality of this.
So then I thought, what if I split it into two parts, and post two 3K selections? (No good stopping points for three selections.)
But I'm not really sure how well that would go over on this site. I've been coming by for a long time (counting the old site) but I've never been a "regular." Would that really work out well? How many people would skip the second part? How many people would read the second part without reading the first?
And how does this really work out in this community, considering the rule that people must offer a critique for their posts? It feels like I'm fudging the economics of the site by making two posts for just one story.
Has anyone else here tried breaking up a story into multiple parts? Have you found any sort of "best practices" for such a move?