1) people who seem to have gotten the highest scores are not following directions properly (e.g. someone on Twitter who got >98 used decidedly technical terms like "codec", despite clear instructions not to use technical jargon)
2) this seems to measure how extensive your vocabulary is (e.g. obscure noncommon words seem to score much higher than common words, even though the common words may be quite diverse, seemingly simply because common words are...well, more common and so more likely to be mentioned in a sentence together, just owing to English sentence structure).
I don't understand how knowledge of a broad amount of words maps to creativity? The person who would do best on this test is someone who knows a variety of very obscure nouns. In other words, someone who memorizes a wordlist. How does this map onto creativity?
Case in point: young children are extremely creative, and yet I predict would score very low on this test owing to a very limited vocabulary.