I kept up my allowance for two months just to buy sufficient UC to get the Lucky Spin Royale pass
https://www.scribd.com/document/1007461950/Recording-Every-PUBG-UC-Order-for-Safety-Lessons-Learned-with-Manabuy-223158
I saved up my allowance for 2 months simply to purchase sufficient UC to get the Lucky Spin Royale circulate, making the grind wholly valued at it.