within, 10 days, you will have the opportunity to bet with or against players. When you use space-time tokens you can either use the ones from the shop or bet items. The one from the shop, can be bought only be bought with ingots and you can continue betting them and eventually convert them into coupons. However, if you do not wish to invest ingots, you can invest via CERTAIN items.
This is just my little understanding after reading the thread in regards to space time. The information may or may not be correct.
Hope it helps.