Reputation power depends on the number of posts and reputation you have.
The more posts and the more reputation ( Oh I didnt know that, I thought it has to do with the years and not more rep. )you have, the higher the reputation power you get.
The reason why your reputation points remain at 10 is because the people who rep you may have 0 reputation power. - Hugo Boss
Learn to use the search bar buddie, you arent the only one asking this type of question.