I was selected to be part of this first cohort with Mockoon. I'm from Luxembourg, so 20k is surely not a life changing amount of money. However, I quit my job two years ago to focus full-time on it. I think that I can make a living (probably a mix of paid services and sponsoring) while keeping the app open-source. But it's a long hard road and I am freelancing on the side which gave me the right balance but not complete peace of mind, financially speaking. So, while it's not a life changing amount, it will buy me some precious time. I also feel really motivated by this awesome recognition (after 5 years of work on this project) and I am looking forward the 10 weeks of coaching. So, all in all, it's a bit of a life changing event for me :)
(Edited a bit for clarity)