Im using the below as an example but if you combine the code LUNAR10 ($10 off when you spend over $70) with the 20% off sitewide you can pick up some pretty good bargains, especially if you are buying sale items that have already been reduced. You also get an automatic free delivery as its over $50.
For example -
Lilah Lace Dress Style Number: DR9579 was $139.95 reduced to $89 on sale comes in at $71.20 after the 20% off built in discount. Take off another $10 via coupon code LUNAR10 and the whole thing comes in at $61.20. That's a total saving of $78.75 (or 56%).
I know that you can do better if you buy other sale items that have been reduced even more but remember you need a basket value of at least $70 to get the $10 off.
The 20% extra discount expires Midnight 26.01.2017 and the coupon code expires 30.01.2017