This is a forum for helping out people not just getting a higher score. You get a score for every answer you post. You also get more points if other people give you a +1 to your answer. To get a higher score, provide good, quality answers and try to help people out. If your prime focus of being on this forum is getting a higher score, you're missing the whole point of this.
Your stament is very confusing... "Also, the question asker..." do you mean just the asker??...
I think hugo means that the person who asked the question give either +3 or -3 instead of +1 or -1. For example if I (the person who posted this question clicks the +1 or -1, I will give +3 or -3 instead.