Accelerating Bitcoin adoption through fun, fairness and real interaction.

21Stacker is a Bitcoin-only, community-driven prize draw platform built on a simple idea: the best way to understand Bitcoin is to actually use it. By combining provably fair draw mechanics with real Lightning and on-chain transactions, we turn every draw into a hands-on learning experience — with the chance to win game-changing sats along the way.

How Emerge21 led to the creation of 21Stacker.

Before 21Stacker, we founded Emerge21 — a Bitcoin education service designed to help individuals and businesses understand why Bitcoin matters. We taught the fundamentals: why our current system is failing, how Bitcoin fixes it, and how Lightning, on-chain payments and self-custody truly work.

But we noticed something important: the people who understood Bitcoin fastest weren’t just watching webinars or reading guides — they were the ones who actually sent a transaction, opened a Lightning wallet, and felt what Bitcoin can do.

Interaction created curiosity. Curiosity created understanding. Understanding led to meaningful adoption. We realised that education is powerful — but education + real usage is transformative.

A fun, provably fair way to learn Bitcoin by using Bitcoin.

We asked ourselves: “How do we get people using Bitcoin, asking questions, and having fun while they learn?” The result was 21Stacker — a Bitcoin-only platform where every draw teaches you something new.

• Bitcoin-only platform — focused, honest, and mission-driven.
• Provably fair draws using SHA-256, Bitcoin block data, and pre-committed secrets.
• Bitcoin-specific skill questions in every competition — learning through participation.
• Hands-on interaction with Lightning and on-chain payments.
• Community-first design where everyone contributes to adoption.

Every draw is an on-ramp. You see mempools, confirmations, fees, transaction speed, and the power of open monetary rules — all through real usage.

21% lifetime commissions — in sats — to grow Bitcoin adoption.

Our affiliate system is designed for Bitcoin educators, podcasters, creators and everyday Bitcoiners. Affiliates earn 21% lifetime commissions on every ticket their referrals ever buy — paid directly in sats over Lightning.

This creates a circular Bitcoin economy where the community helps grow adoption, and is rewarded in Bitcoin for doing so.

2.1% of every draw goes directly to OpenSats.

Education + Interaction + Skill + Fun = 21Stacker

We started with Bitcoin education. We realised the missing link was active engagement with the network itself. So we built a platform where people can:

• Use Bitcoin in a real, practical way
• Answer skill-based Bitcoin questions
• Join a global community of stackers
• Support Bitcoin-powered charities
• Earn and win sats along the way

A fun, community-driven way to grow Bitcoin adoption.
Better Odds. Better Money.