Contests are a core way to drive participation on your Ning Network and keep members coming back. For example, the folks at My Kicks on Fire ran a contest to win a free pair of Nike Air Yeezy sneakers. To enter, members were asked to help get the word out via Twitter. Friends or Enemies launched a t-shirt design competition, where the winner had their design printed and sold in the FOE merch store. To participate, members uploaded their proposed t-shirt design to the group in the comments section.