Reply To: Min order quantity and free product

[Soft79]

Just extend your hook script, like this:

add_filter( 'wjecf_free_product_amount_for_coupon', 'wjecf_free_product_amount_for_coupon', 10, 2 );
function wjecf_free_product_amount_for_coupon ( $amount, $coupon ) {
  switch ( $coupon->code ) {
    case 'free-x-for-every-y':
      $amount = WJECF_API()->get_quantity_of_matching_products( $coupon );
      break;
    case 'free-y-for-every-three-x':
      $amount = intval( WJECF_API()->get_quantity_of_matching_products( $coupon ) / 3 );
      break;
  }
  return $amount;
}

(Untested. Please the replace coupon codes with yours)