dont think that is true tho. i was subed to a girl that took almost 3 monhts (for mental health) off and still got charged for it, no updates or anything on OF.
Weird. I had a girl on OF that wasn't on for a year. After her not posting for 30 days it stopped charging me. I know it stopped because I would check my charge receipts every month around the time it would come out and nothing was charged. It even said I was still subscribed, but when I went to the page I couldn't view anything. If I clicked the subscribe button it would ask if I really want to get charged since the person hadn't posted in a while. Maybe it was a glitch and shouldn't have happened that way. I don't know. When she came back it started charging me again.
Now if you're talking about a girl who still has an account and you're not subscribed to them and it wants to charge you. That would make sense. Because you're still trying to access the account. Maybe it also depends on the backend settings too. I have only ever purchased and never charged for anything.