I have noticed that when I am posting a story, the download count of my other stories go up.
I suspect that happens for most authors who tend to post completed stories with some time between one story finishing and a new one starting.
with me it's the other way round.
If I see a new story starting "in progress" and the description catches my interest and I've never read any story from this author then I lookup his other stories looking for the yellow "incomplete" and how long it took him to complete his other stories then probably download and read a completed one. Now I decide if I will start reading immediately or wait for completion or ignore his/her new story.
BTW, I can't read more than three to five stories concurrently without mixing up the plots in my mind, so I prefer to read completed stories or stories completely written and posting at least twice a week.
Just my € .02