I was just about to make a post about how when my ECR was 50% I was getting 4-5 DEC per win and I took a break and let it recharge to 100% and my last win just earned 1.6 DEC... (break was about 2 days) I guess there are more factors that go into calculating the reward
RE: Value of DEC Rises as Splinterlands Re-evaluates the Game