Programming contest
j/k
How about a dare contest, put out 15 crazy things you would like to see pictures of, and the first 15 that post them will win. Pictures have to be original, dated, and have a gfy username fansign in them. So like for example "picture of you pumping gas without pants on" or "picture of you wearing your wifes undies"
you get the point...it will make for a much more intresting contest then "post count" contests...