Post-purchase 'roll a die' refund promotion app

Amazing Shopify app idea to steal: A post-purchase popup where customers roll a 10-sided dice for the chance to get their entire order refunded. In economic terms for a brand at enough volume it works out as offering all customers a 10 percent discount. → The winners will never shut up about it. → Everyone else gets the thrill of “I might get this for free.” → And you get a conversion-boosting mechanic that feels fun. → It doesn't come across as just another discount code It'd only work post-purchase as doing pre-purchase people could beat the system by just changing their VPN 10x to get their code. Someone build this pls.