I have seen the trials and tribulations endured by people in the DNM ecommerce scene and I just don't think those people are willing to accept the tradeoffs inherent to ecash. they are some of the only people who have ever bothered with multisig escrow in an ecommerce setting. they already loathe the idea of leaving their money in centralized escrow during a sale of physical goods. nobody wants to increase their risk of getting burned for any reason.