Just be carrefour with scam oracles guys. It is possible to set owner fee to 100% and collect all money that voters locked for vote (no matter if right or wrong answer). Always check all oracle date especially owner fee, your reward and amount of Idena that need to be locked to vote.
Owner reward is not 100% in case of owner fee is 100%:
Owner reward = (Smart contract balance — Voting deposit * Number of votes) * Owner fee %