If someone has recently writen "Trade Your CS:GO Cases For Keys! 4 Cases = 1 key! (Site link)" The link has been changed for you not to open it. This is a scam if someone has written it in your comment, know that this is not themselves and it is a scam. if you have logged in to the site it will say that the site is under service. What the site does is go in to your friends list and it sends the comment to your friend (Bot). Spread this to everyone you know. Change your steam password.