It looks like Augur has no way to validate the "REP holders" though?

This means a sybil attack can be launched by anyone behind the Augur project (assuming they set aside large reserves of REP for themselves, how would anyone know?), or anyone who acquired thousands of ETH in the presale for $0.50USD, or anyone with excessive capital can attack any Augur "prediction" and manipulate the outcome in their favor.

Augur essentially gives total power to manipulate "truth" though tokens / capital.

(edit, downvoting to suppress information? please explain why this post is wrong)