I know I've got one :) but I really don't know how I won it :)
I've added a lot of things in other spots and I haven't got other medals yet :( I can't understand it! LOL
as you can see ^ know one is cretin how they are done, but people have come to the solution of rating, obviously the spot you have you medal in, your contributions have been viewed and rated higher than your contributions to the other spots.