1. How does Zentrade differ from Predictious?
2. I won't send bitcoin to a site that can't prove it controls the keys for 100% of customer deposits.
3. Obama vs. Romney?
Parimutuel betting pools are less attractive to truly savvy bettors, profit-motivated and deep-pocketed, because there's no way to be sure your advanced insight, at a particular point in time, will have a positive expectation when the betting is done.
Just signed up.
One suggestion: two-factor authentication. After so many hacks, 2FA should be available on any site that holds users' bitcoin.
No transparency? No thanks.
So this has the same flaw that Predictious has. It's building a BTC bank in addition to a prediction market.
That's the easiest thing to build, coming from a world of traditional fiat money banking. But BTC enables something superior - 2of3 transactions between betters. We create a 3 way transaction - Long says "I want the money". Short says "I want the money". When the bet is concluded the arbitrator says "Long won, give me 1%."
The arbitrator can never go insolvent - in fact, the arbitrator never needs to hold a single bitcoin.