BOGO promotions diye geçer. Aşağıdaki eklentilerin birisiyle yapabilirsiniz.
https://www.flycart.org/blog/woocomm...in-woocommerce
https://woo.com/products/buy-one-get-one-free/
https://advancedcouponsplugin.com/bu...-1-half-price/