I see this thing all the time on various sites. From what I've read, they are supposed to say what they can do with it or plan to do if they meet up with you (especially if they are an escort). I've never tried it myself. Most of the money I've paid into this have gone directly either on subscriptions or pay-per-view videos/audio if I'm particularly turned on by something.
However, honestly, my interest level hits the floor when it comes to interacting with the women on OnlyFans. It's like there is an energy slump and I'd rather do anything else. It's like I just like the pics/videos, that is why I paid the subscription. In fact, there are some girls that try to reach out to me to talk in other OF pages, and I'm nonresponsive to them.
Don't know how other people are wired, maybe they like talking to them?