Guys thank you for your answers, and the time you lost for writing these messages. While giving you the question I lost 3$ and won nothing.
I thought that I will win, but the winner was another fake account of the owner of that scam.
Still, I believe that there are really good giveaway sites. But it should b hard to get to them
Better not to bother with these website, it's very likely a scam. Why would anyone give away a laptop for $1. In the end there is always some manipulation I believe, they either don't give out any prices or they just give it to friends.
You have better chances of winning something if you use that money in an online casino.