I had a Softears Twilight in my cart when I applied the $100/$500 codeThe spend and save is applied before they calculate if you have enough spent to qualify for the code.
I lost a few handfuls of hair before I figured that out!
This is the error code I got: Sorry, these coupon codes have already been claimed. However, you can still enjoy other great deals on AliExpress.
My only guess is that this code can only be redeemed a select number of times, something like purchasing Linsoul GCs.
Oh well, on the bright side, one of the $50 codes does work for me right now.