Is there any good article, post, add-on for a great reward system in XF?

[NandorHUN]

Hi Guys!

Is there any good describtion or article, comment for a great reward system in XF 2.2? I want to encourage users to use the forum, but I dont want to make them feel like I treat them as children. Setting up it like I give them cookies for every bit of action or whatever make me think that will make the site less professional.

Thanks for the help.