If you never used this site, don't worry. It happened that this site (it was a very know service on steemit because they has some interesting tools and also a bot to upvote contents. The issues was because one week ago they announced the shut down of the site and today they say the site will come back, 2 posts and they used the upvote of every accounts of the site . They can do it because in the terms of service they wrote they can use the upvote of every account to promote the announcement about the site. The part of the site where you can "adjust" this thing say that they use just rarely this option (and I've never see that part and I'm sorry for this), but they use one time 6 days ago to announce the closure and one today, using the 100% of our voting power, 2 times at week without any words to explain this to the users . It was really bad, because every user like me, that I'm not using the service of the site (it's not clear how to cancel the subscription) give the upvote knowing nothing.