Once you figure out how to convert those TFuel Coins to TFuel do make a post about it. :)

I've read some of the comments below and I might try them up for myself too.

What I experienced yesterday though (to which I think you already know seeing the last screenshot) is that those TFuel(?) Coins can be used on the stream's giveaway section to get a chance to get whatever giveaways the streamer is giving. They sometimes give TFuel, Emoticons and other stuff as prizes.

Also watched a gaming stream yesterday in which the streamer made a poll whether he will win or lose the match. I think it was 100 Coins to enter the poll. I left the stream early though so I'm not sure if choosing the write answer gives one TFuel as rewards or not but when I logged-in today, no TFuel's was added. Still 0. xD