A little time and effort is needed to develop the perfect challenge for you, but once you build it, you can run it again and again! Free challenges done right are not just a one-time marketing tactic. You can run the same free challenge at a frequency of your choice, and constantly be growing your brand awareness with each new set of participants. Depending on your business and they type of challenge you run, previous participants will join again, they'll even look forward to it! How's that for brand awareness?!?!