i get that they post the long stories like a chapter at a time, to keep it around and have people keep coming back... but why not completely finish the story first, and than post chapters weekly...
Writers in general crave feed-back, it's not specific to hobby writers, writers who write only for their own benefit and keep their writing strictly to themselves probably are the minority .... or why would a whole industry live off publications?I don't know that I have a good answer, but in my experience it seems hobby writers (in general, not just around here) crave feedback.... Only to leave it incompleted eventually anyway when they themselves lose motivation.
Posting stories chapter-wise in my case has to do with a mix of time and motivation.
I generally plot out the whole story and start by quickly writing a few central scenes of the characters development. But since I do this writing as a hobby, I don't have the time to fully write the whole story of several dozen pages in one go.
Getting feed-back, knowing that somebody else except myself might be interested in the story and the characters actually keeps me motivated to finish it, even if I'm short of time.
Sometimes feed-back has contributed to alternations in the story, it's build up or character development - and that interactive part is very rewarding.
But I do agree, posting only scraps of chapters is annoying, you need a certain amount of context to make reading worthwhile ... and there is nothing sadder than an unfinished good story!