I've got the kids this week, but since it looked like the Science Fiction: First Contact free bestseller list was coming back up, I ran a Facebook ad just to make sure Trang would still be on the front page if and when it did. It did, and Trang didn't lose ranking, so yay.
Not that this solves the dependence issue....
I don't think I've actually sold much of anything on Kobo (impressive how well I keep on top of the business end of things, isn't it?), so I've never had a payment screwed up there, but it sounds like other people have. So I'm probably going to switch to distributing through Smashwords with them, too. If they can't cut a check properly, they're not much use, are they?