The hidden banks behind crypto cardsOriginally published on Sweepbase Research. On 21 January 2026, Poland's Financial Supervision Authority pulled the payment-institution license of a small Warsaw company called Quicko sp. z o.o. TwelvMay 20 · 21 min readsweepbase.hashnode.dev
Building a crypto card aggregator on a public CSV instead of a databaseMost comparison sites I read in 2025 had stale data. The Binance Visa was being recommended in posts published a year after it shut down. Crypto.com cashback rates were stuck on 2021 numbers. So I buiApr 30 · 3 min readsweepbase.hashnode.dev
