This was a hidden term many (3+) years ago at these casinos (Swiss and Tropez groups). They are still misleading players in this way by stating two seemingly contradicting terms. This is the exact same problem here:
http://mb.winneronline.com/showthread.html?t=5656
Not too long ago (2 years) they were also trying to remove winnings and bonuses for no reason at all.
http://mb.winneronline.com/showthread.html?t=14259