PLONK Wine Club Coupon: Save $15 On All Valentine’s Day Wine Club Gifts! Last updated by Hello Subscription on January 31, 2019. Subscription Box Coupons & Deals / Plonk Wine Club Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification Plonk Wine Club is offering $15 off on all Valentine’s Day Wine Club gifts! Use the coupon code LOVE19 to get the deal. Offer valid through 2/28.