



The card and the $400 you spent are not directly linked. You are buying $400 of CRO with a commitment of you being unable to touch it for 6 months. When that 6 months is up, that CRO is back to you. You just can't touch it for the first 6 months. And it earns CRO back during that 6 month time.Then I don't get it.
To reward you for staking that CRO you purchased, they provide you with a debit card with cashback (CRO) perks. If you want to use that debit card, then you have to add USD to it first.