M2购买某商品免费得礼物扩展Amasty Free Gift

购买A商品免费得到 B商品，或是购买A商品让客户选择免费的几个商品中的一个并给其免费 此扩展可以自动添加免费产品到购物车，有非常醒目的广告条，告知客户关于特殊的优惠政策。
Get four promo actions to automatically add free products to cart. Show catchy banners to inform customers about special offers and let visitors select a gift among available promo items.It's a well-known fact that additional incentives like free gifts effectively attract customers and increase the number of spontaneous purchases. While default magento 2 promotions offer rather limited functionality, store owners need an additional tool which automatically adds free products to cart. With the Free Gift for Magento 2 extension online merchants will be able to run various promo campaigns based on free gifting, thus effectively building customer loyalty and selling more.