I am also very critical when it comes to random websites giving away free money on the internet. It's very hard for any company to give every user 5 USD for nothing, how are they able to keep it up for a longer period of time? When looking at such websites, my first question is always how are they making money? There must be some form of revenues to offset the give away of free money. One way would be to run advertisements on the websites and try to earn money on commissions, another way could be for the company to sell personal information of their users. So when you see a lot of popups and banners that offer a variety of products I would assume the company gets money through ads. The problem is how many people are visiting the website and does it really leads to sales. In my opinion it's better to remain cautious and don't give any personal information to that site. Make a fake email to sign up at the website and don't use your full name. Trying out the website doesn't hurt, just don't invest too much time and don't feel bad if you don't receive the money, it's free after all.