Questions about some of the points in that article were addressed here:
https://www.reddit.com/r/Monero/comments/4r5tcm/decentralized_prediction_market/

More from Augur and Hivemind lead developers here:
https://www.reddit.com/r/Monero/comments/4r3lz6/i_never_thought_this_would_happen_respect_to/d4yhgf0
https://www.reddit.com/r/Monero/comments/4r3lz6/i_never_thought_this_would_happen_respect_to/d4yhd95