smouse - I too have raised this with "hisgrace". If you look at the "riddles" section, you will see that hisgrace is doing really well answering questions by him/herself !!!
And, as you say, they haven't got the decency to say that the questions are from Macmillan. I still find it very hard to understand how someone like hisgrace can get any satisfaction from entering a quiz when the majority of their answers are not their own?
Yes, I am doing the quiz and very enjoyable it is too, apart form the fact that it gets continually spoilt by hisgarce and friends.