Hello,
With our app Stack Discounts Ninja you can apply 2nd discount after the 1st discount, and so on.
For that you need to use Reduction type of our campaigns.
You can also have automatic and code based campaigns with reduction type, and code discount will apply after automatic discount.
This is an example of applying tow 20% discounts on $100 product:
-
$100 - 20% ($20) = $80
-
$80 - 20% ($16) = $64
Thanks.

