The email that did get me to start using Flightfox was another one sent to you a few days later after you had signed up, looked around, but didn't end-up launching any contest.

In that email Flightfox said they noticed that I didn't launch any contest and gave me a coupon that covered 50% of any contest just to try it out.

So that's how I started using their service.

On the other hand I also learned there are other things to take into consideration when launching a contest. The most important one, knowing you have to buy the ticket as soon as possible. My contest was a tricky one (involving a toddler, timing international connections in the US, etc) so after 3 days there was only one decent result, and it was gone by the time I wanted to purchase it :(

So I guess that was the reason why the longest duration of the contests is of just 3 days. Which reminds me, I still need to go back there and do it all again.