Well I think that I have not cleared my thought to you, I am thinking that if there is a competition going on then the users can take part but only if the choose to loose some points and those points will get deleted from their account and will not be transferred to some other account, first example is this.
If in future some system is built like in stackexchange, that some question can only be answered by the users who have a fix amount of points and that fix amount is set by admins of administrator. So if I have a valuable information for such a question and I do not have that much of points then I can borrow it from other users in exchange of some badges or other stuff or even normally. That's what I am thinking.
I know that building such a system will mess up a lot of things but still developers have developed q2a till here so I believe that they can do this as well. As some of the features are already on stackexchange so this is also not impossible.