Im taking a guess that its because in general the term .......survivor.... covers both those actively going through something, trying to get through it and also those who have already gone through abuse and lived to tell about it. the term .....abuse ....in general covers all forms of abuse (emotional, physical and sexual)

that means anyone who has been or is being emotionally physically and sexually abused, has questions about emotional physical and sexual abuse, and those that perceive their self to have been abused in some way or knows knows someone that has been abused in some way can post in that forum.

like I said...just taking a guess, ultimately only the creator of that forum title can say why he named it as such.