Charity"If the challenge is not marked as Complete prior to its deadline, the $ contributions will go toward this Charity."
This is probably one of the best challenges created on social media yet: the #Trashtag challenge consists of before pictures of areas full of litter and trash heaps and after pictures of what they look like cleaned up. People then share the photos on social media with the hashtag #trashtag.
Simple. Powerful. A great example that shows social media challenges can be much more than silly and meaningless challenges that teens sometimes do.