Just a thought and it may be a good idea
How hard would it be to implement a "like", "thumbs up", or other type of linking for social media? It could possibly give the forum more exposure especially with very useful threads that have been created. Say a new/current user finds a thread for a problem that's been troubling them for a long time, and the solution is in there. They can give the appropriate "like" that links to their social media so their friends and associates can see that they found a good answer from this forum. It could inspire their friends to visit as well to get help and contribute.