Bundle. Make slots such as cleanser, serum, cream. Each slot takes the best matching simple product in stock from its targets. At least two must fill. Add all to cart adds them in one click, and the discount holds while every item of the bundle stays in the cart. It works in block and classic carts. Bundles leave variable products out.
Reward. A one time coupon on the result screen, in the results email, or both. With the email lock on, the code works only with that shopper’s email and a retake gets the same code. A shared result link never shows the code.
