I've donated to the threat detection and Immune system ones. Money is only taken from your account when the target is reached.
Some more here.
Video about 'Football Therapy' being used to treat Sz in Italy. (An official FIFA video.)
Re perceiving threat, there might be no need for deep brain stimulation. The online self esteem games from McGill University at the link below can train a person to ignore threatening faces.
Immune system function can be greatly improved by feeding the gut bacteria correctly. Gut bacteria is fast becoming a hot topic with researchers.
The problem with those games is that they are very much dependent on mouse control and fast reactions. Neither of which I am good at.