Nor should they be. I think everybody making a decision whether to burn or not is fully aware of the risk that they may not get anything in return for burning BLK. Based on that, I think 13mil burned out of 77mil (16.8% @ $500K USD current value) shows extraordinary confidence in either an idea, a person, or a project. Its a much safer proposition to wait until the product is completed and working in order to participate in acquiring tokens.
I cant say I dont feel some uneasiness about the BLK Ive burned.