Users in r/todayilearned have received messages from spam accounts claiming they won a gift card in some contest. These accounts usually contain “mod” in the username, and start their messages by saying “Our Reddit team chose YOU for our monthly raffle for a $100 gift card (Yay!)” to trick people into thinking it is an official subreddit contest. If you received a message like this, please do not click on the link or reply to the account as it this offer is not genuine. Additionally, please report it to the admins here so they can remove these spam accounts from reddit. r/todayilearned does not run contests like this, and official messages from the subreddit will be sent from "/r/todayilearned", not individual user accounts.
Edit: These morons are also hitting the users of r/askreddit hard because they have a sticky about this issue.
Edit2 3/14: I guess these guys are slightly evolving their tactics, but they are still hitting our TIL community so putting the sticky back on because... keep reading on reddit ➡