Reply To: Incremental free gift(every buy 2 get 1 free)

[Soft79]

Yeah, tick the boxes ‘Allow Multiplication’ and ‘BOGO’ and paste this filter in your functions.php:

add_filter( 'wjecf_bogo_product_amount_for_coupon', 
function ( $qty, $coupon ) {
    if ($coupon->code == 'SOME_COUPON') {
        $qty  = floor( $qty / 2 );
    }
    return $qty;
}, 10, 2);

replace SOME_COUPON by your coupon code.