Well 50 bucks doesnt seem possible, I won weekly contest in row for 2 weeks and what i can tell you is;
If you get high paying and easy to do works you can get 20 USD by about 400-500 tasks a day plus daily bonus and if you win the weekly contest you get 50 bucks and divide to 7 you get 7 dolars a day. Which means the best possibility you get a day is 30 bucks each day. Good luck