Edit: mystery solved in the comments. Thank you!!!

Okay, one of my stories have been on friends-only for weeks now, and a non-friend/newborn account was able to subscribe to it today. But from my understanding, you can't subscribe to a story unless you can access the story and literally click the sub button.

unsubscribing is a whole different story. So I guess, I am confused and worried about any more glitches. Like, what if one day someone is able to read a hidden chapter or a crowd fund chapter?

Anyone else having glitches?