Would be a nice gesture, but is not a good business model. Shipping the full printer costs a lot due to the glass panels, the value of the printer should shipping damage occur, and the size and weight. All these things change the handling during shipping which increases the cost. Besides, I only paid like $39 for shipping. I’ve bought brackets from 8020 that shipped 1/3 of the distance for nearly that much.
The AMS on the other hand could be offered with free shipping as a promo to sell those things!