"When making purchases, one purchase is monitored by up to 5 arbitrators. Each one of them has the right to return money to the buyer"
I'm positive I'm not reading that right. You've created a currency where I need permission to use it?
No, you have quoted the description of arbitration (http://en.dcoinwiki.com/Arbitration) which is just an additional option, it is not a must to use it