> Personally I am not sure what the appeal is of all these bigger sites adding "marketplace" sellers. Money. No inventory (i.e. capital), no COGS, no returns (

> Personally I am not sure what the appeal is of all these bigger sites adding "marketplace" sellers. Money. No inventory (i.e. capital), no COGS, no returns (depending on the model), no assortment optimization. Just a share of what someone else does.