There are two profile pages one for Scribble Hub proper and one for the forum. It is a quirk in the system which act like two different entities . So you have the more private one here or the more visible one on the forum to communicate with people you know. And so far they don't alert each other when messages are posted
I assume your part of the group that is also in RoyalRoad ? The forums of ScribbleHub are based mainly off the forums of NovelUpdates (NUF) which are more anarchic than what i can see of RoyalRoads'