We actually have two formats, one is called Standard Zombs (standard tasks) which is bid-based just like ScienceExchange. The other is called Bounty Zombs (Q&A'

We actually have two formats, one is called Standard Zombs (standard tasks) which is bid-based just like ScienceExchange. The other is called Bounty Zombs (Q&A's) similar to http://prizes.org/ http://prizes.org/ format. If you go to http://zombal.com/scientific-challenges http://zombal.com/scientific-challenges as you pointed out you can filter out the different types.