I think it has to do with if you leave the tick on the box that allows them to curate/read your story so as to include it in the paywall. That’s fine for a regular story, but if you are sending out an invite to contribute a story, maybe it’s better not to let the box be ticked off. It is auto ticked off unless you untick it.

And no, I am not a paying member yet, slowpoke, that’s me. LOL