esun Esun_FreeGift::config Magento\Config\Model\Config\Source\Yesno esun_free_gift/general/enabled The product must be an enabled simple product assigned to this website. Set Manage Stock to No and Visibility to Not Visible Individually. required-entry esun_free_gift/general/gift_sku 1 Leave empty to start immediately. Esun\FreeGift\Block\Adminhtml\System\Config\Form\Field\Date esun_free_gift/general/start_date 1 Leave empty for no end date. Esun\FreeGift\Block\Adminhtml\System\Config\Form\Field\Date esun_free_gift/general/end_date 1 Esun\FreeGift\Block\Adminhtml\System\Config\Form\Field\TierItems Esun\FreeGift\Model\Config\Backend\TierItems Compared with the base subtotal after discounts, excluding tax, shipping and gift items. Tiers are evaluated from the highest amount down. esun_free_gift/tiers/items