Chinese internet giant Alibaba Group Holding Ltd. BABA started allowing shoppers in Europe to pay for purchases on its international e-commerce platform only after receiving their merchandise, in an attempt to boost global sales as growth at home slows. On Monday, a fintech company called Splitit Payments Ltd. SPT said it would join with Ant Group Co.’s Alipay to provide a delayed-payment option to customers of AliExpress, an online marketplace operated by Alibaba outside of China.