The following is a list of what is possible with higher reputation/trust scores:
Withdraw Capability: Can withdraw $PIXEL or other currency [1,500 Reputation]
Marketplace Use: Can Buy in Marketplace [1500 Reputation]
Marketplace Use: Can Sell in Marketplace [1500 Reputation]
Guild Creation: You can create your own guild [2,205 Reputation]
Guild Verification: You can apply for your guild to be verified [1,500 Reputation]
Trade Threshold 1: Trading [up to 2,000 coins unbalanced] [945 Reputation]
Unlimited Threshold: No Limit on Trading [2250 Reputation]
Coin Trading Threshold: If you're trading using coins [1,905 Reputation]
See how to increase your reputation here.