---
title: "SweepBase (@sweepbase) | Hashnode"
description: "Compare 139 crypto cards by real fees, not marketing. Read the latest articles by SweepBase on Hashnode."
url: "https://hashnode.com/@sweepbase"
---

@sweepbase

# SweepBase

@sweepbase · Joined April 2026

Compare 139 crypto cards by real fees, not marketing

### [The hidden banks behind crypto cards](https://sweepbase.hashnode.dev/the-hidden-banks-behind-crypto-cards?utm_source=hashnode&utm_medium=feed)

Originally 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. Twelv

21 min read · [sweepbase.hashnode.dev](https://sweepbase.hashnode.dev/the-hidden-banks-behind-crypto-cards?utm_source=hashnode&utm_medium=feed)

[May 20](https://hashnode.com/posts/the-hidden-banks-behind-crypto-cards/6a0e06b48b03460221a899f4)

### [Building a crypto card aggregator on a public CSV instead of a database](https://sweepbase.hashnode.dev/building-a-crypto-card-aggregator-on-a-public-csv-instead-of-a-database?utm_source=hashnode&utm_medium=feed)

Most 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 bui

3 min read · [sweepbase.hashnode.dev](https://sweepbase.hashnode.dev/building-a-crypto-card-aggregator-on-a-public-csv-instead-of-a-database?utm_source=hashnode&utm_medium=feed)

[Apr 30](https://hashnode.com/posts/building-a-crypto-card-aggregator-on-a-public-csv-instead-of-a-database/69f33315909e64ad07b05d08)