Promotion Extensions should have an option for free shipping
I know Promotion Extensions are in pilot, and that's great. But as part of the Promotion Extensions, we should be able to do a promotion for Free Shipping, either with or without a code. Lots of my clients do Free Shipping promotions, but you can either chose a Monetary or Percent discount, which means Free Shipping promotions won't work.
Andrew Adair commented
Have you ever tried, or tested, setting the promotion extensions as a percent discount?
ex: 100% off - shipping costs
promo code: CODE