How do you other DT members feel about this sort of tag? They are basically stealing from a site and know they are not allowed. Yes they get nuked from the campaign within a day but that hasn't deterred 50 of them from trying.
If they actually posted and got paid (can you see which users got paid and how much?) then a tag is appropriate. If they didn't get paid you should probably give them the benefit of the doubt. Ideally Yobit should verify the rank before paying. It doesn't make sense to have automated payouts without basic protection against abuse or mistakes.