Why do platforms become monopolies?

Two networks start nearly equal. Network effects mean value = users². Watch how a tiny head start becomes an unassailable moat.

Bars show user counts. Bottom chart tracks growth over time. Cyan = Platform A. Amber = Platform B.

What you're seeing

Two competing platforms racing for users. They start nearly equal, but network effects mean the more users a platform has, the more valuable it becomes — attracting even more users.

How to read the graph

The top bars show each platform's current user count and market share. The bottom chart tracks how both platforms grow over time. Watch how a tiny initial lead (Platform A starts with just 20 more users) snowballs into total dominance.

The key lesson

When value scales as users-squared (Metcalfe's Law), tiny initial advantages become self-reinforcing monopolies. This is why Facebook beat MySpace, why WhatsApp dominates messaging, and why network businesses are winner-take-all. The feedback loop is: more users → more value → more users.

Round0

Platform A Users100

Platform B Users80

Market Share (A)1.0%

User Ratio (A/B)1.3x

Press play. Two competing platforms with nearly equal starts. Watch how network effects — where value grows with users squared — create a winner-take-all dynamic.