https://sellercentre.ebay.com.au/promo/7119

This is for stores as well as non-stores - no insertion fees from the 4th to 6th.

Not sure what happened to yours, tippy, but the link you put in is the same as the one I got for no selling fees.  It might pay you to have another look because both promos are showing on my non-store account (5802 and 7119).  You may have seen the top one and not noticed the one beneath it for no fees.