I kept up my allowance for 2 months simply to buy satisfactory UC to get the Lucky Spin Royale cross
https://padlet.com/cicamavaguw29ceamv/bookmarks-2qnh3dvb9ow6y28f/wish/R7dXad98gwnDQ6bl
I saved up my allowance for two months simply to purchase sufficient UC to get the Lucky Spin Royale circulate, making the grind entirely worth it.