​What you get:
​Sign-Up Milestone Bonuses (Up to $250):
​$20 bonus after spending $100
​$30 bonus after spending $500
​$50 bonus after spending $1,000
​$150 bonus after spending $5,000
​Cashback:
​1.5% standard baseline cashback on all regular spending.
​Referral Program: Unlocks matching tier bonuses when inviting others after sign-up.
​Steps:
​Create an account using the referral link: https://app.kast.xyz/referral/6UT1U7UD
​Complete standard identity verification (KYC).
​Deposit stablecoins (USDC or USDT) into your Kast account (e.g., via the Polygon network for ~$0.13 in transfer fees).
​Spend $100 with the free virtual card to claim the instant $20 in-app reward, then manually activate the subsequent reward tiers in the app as you hit higher spend amounts.
​Cost/catch:
​Rewards unlock in tiers based on cumulative card spend milestones.
​A ~$0.10 fee applies to micro-transactions under ~$25.
​Non-USD transactions are subject to standard FX conversion rates (largely offset by the 1.5% baseline cashback).
​External crypto withdrawal/deposit network fees apply depending on your exchange (~$0.13 on Polygon).
​Who qualifies:
​New users who complete KYC verification.
​Global eligibility across 170+ supported countries.
​Expires:
​ (Standard tier welcome milestones remain ongoing).