You've posted this in two places that are very popular amongst UL backpackers - especially those that make their own gear, as do I. No, I havn't been following you around the web, and I don't work for mgear - I just read both board, saw you getting libelous in both places, and felt compelled to respond. I just think it's wrong to criticize someone (I should probably say, 'disparage') for YOUR obvious inadequecies as a consumer.
You say, "It is far from standard practice--- they're are many E-retailers I use that offer free shipping for sale goods".
Within the context of my post, that is meaningless; I suspect you need to re-read my post and/or take some reading classes. I said it was standard practice to NOT OFFER free shipping on EVERYTHING, regardless of order total or other common factors. You offer up backcountry.com as someone who offers free shipping on sale items, but they too have restrictions- you must order $50 or more. EVERYONE has restrictions on promos like that; ALL of the places you listed certainly did.
Now, I will say this, as someone in the other thread pointed out - there is typically an (*) or something indicating there are restricitons, and mgear does not have one - they should. I still think this is you complaining just because that's the type of person you are.