A link is being shared around about a secret premium membership giveaway by Deviantart
and only a few lucky people know about this secret and oh super awesome event.
You're supposed to give a link to 9 people and you get a premium membership..a whole week extension.. that's just impossible!
Look at the URL, if it's not deviantart.com, then close the tab immediately. Don't trust these kind of events or giveaways that are off-site. Especially if they look like that they are done by deviantART and if they asked you about your email and other information.
FAQ #660: My deviantART account has been hacked. What can I do? ..just in case.
Stay safe, people!