I have visited several forums where a rewarding scheme is for the user who answers to a a query of another user. That award is in form of points or badges, ranks on the vote of question asker.
is there any such schemes here? Many of the users here give their valuable time to solve the problems of others, they put their knowledge and efforts.
SitePoint currently rewards outstanding members with the "Member of the Month" award.
There are also annual Community Awards, voted for by all members. http://www.sitepoint.com/forums/showthread.php?1185546-The-Votes-Are-In-The-Winners-of-the-2013-Community-Awards-are
We will be moving the forums to the Discourse platform next month, and it has a facility where members can "like" a post to show their appreciation.