There are a lot of people dedicated to welcoming new users. They tend to leave comments on new users intro posts. That is why I ask that posts be at least 12 hours old. That gives a bit of opportunity for people to leave comments on the intros, and for people to have made replies to them. If a post has half a dozen comments welcoming a user, and the user hasn't replied to any of them, it doesn't inspire a lot of confidence that user will be very active on the platform.