Hunger Games works in quite a dystopian setting that politicians in US wouldn't allow; so I can see Trump being impeached immediately after this suggestion.
However, assuming that this isn't implemented as a life-in stakes Battle Royale and instead as a sports event improved with Augmented Reality (all weapons are simulated, no real deaths); it could be a fun event to watch. I could see myself betting on athletic people.
Linkedin is the only social media I would reccomend to put yourself out (as in, put your successful projects in) as it's used more as a networking tool to land yourself in better jobs.
Fuck other social media. Anonymity is best.