I think that the best one for you is a huge amount of bounty programms. And it even allows you to save your 1,5$, buy something small and pleasant for you on it 
1$ is too small for starting invest here. You need more money at least 100 usd for better experience trading. I suggest to join bounty if you dont have enough money to start. Gain token and start trading with that token. Its better than start with 1 usd.