For now nothing. In the future whenever you would have to pay a fee for transfering fiat or crypto it will be deducted from the 500$ you just received. If you are not going to trade on this site or invest fiat its probably not going to be worth much to you.
I completed the survey and its displayed for me in the dashboard. So yes, it is free.
I have also 500$ but what can i do whit that?
For now nothing. In the future whenever you would have to pay a fee for transfering fiat or crypto it will be deducted from the 500$ you just received. If you are not going to trade on this site or invest fiat its probably not going to be worth much to you.