At the suggestion of some authors, I provided a new control in the story management page.
Now, you can, if you so desire, hide a story behind the pay wall and then if you had done so, you can make it publicly available again. The pay wall provides a certain measure of protection against story thieves as few of those would ever pay for a site like SOL.
This would be helpful for stories worthy of publishing. For example, when a serial is in progress it's kept in the free area until it's concluded, then once concluded it's left in the public area for a week or two so those following it can read it, and then you can hide it from those who seek stories to steal who usually come later.
Keep in mind that this is only a limited protection considering that the thief might be following the serial anyway or even, if really determined, pay for a premier membership to steal it.
Anyway, it's an available option now.