This next part only applies if you are a Merchant. If you are not, then stop reading (or do, I'm not your dad)
As you may have noticed, there are options to buy direct Platinum from the shop. Well, these options are limited to Merchants only. This is made because they are the only sector that spends their own Platinum in exchange for the relics you get to rad/run. Additionally, Merchants may only acquire Platinum once per month and the amount of Platinum you can cashout is limited and depends on your activity.
Platinum can be bought in multiples of 250 with minimum being 250 and maximum being 1000.
The amount of Platinum you can buy is directly dependent on the tokens you get from merching relics. You need a minimum of 400 monthly tokens to be eligible to buy Platinum.
The cost in utokens is 4 times the amount of Platinum you are requesting
The co-rrelation of tokens-Platinum is:
400-999 merch tokens - 250 Platinum - 1000 utokens
1000-1499 merch tokens - 500 Platinum - 2000 utokens
1500-1999 merch tokens - 750 Platinum - 3000 utokens
2000+ tokens - 1000 Platinum - 4000 utokens
Do keep in mind that this doesn't affect you ability to buy other things from the shop. You can still use your earned tokens on normal shop things.