Background: Polymarket and Kalshi are prediction market platforms where users bet on real-world outcomes. That ranges from everything from elections and sports results... to how long the US national anthem will last before an NFL game. In 2025, both platforms facilitated around US$50 billion in trades combined. This year, that figure has already surged past US$130 billion.

What happened: Meta Platforms is now building its own rival prediction market app, codenamed: "Arena." The project is being developed by a small internal team as Meta looks to enter the fast-growing prediction market space. It would run completely separate from Facebook, Instagram and WhatsApp.

What else: For now, users won't trade real money... the app would use a video game-style points system instead. But Meta still has one big advantage: distribution. With more than 3.5 billion daily active users across its platforms, Meta has a massive built-in funnel to drive adoption.

What's the key learning?

💡 Building a new app when you already have billions of users sounds like an automatic win, but history says otherwise. Having massive distribution helps but it doesn't always guarantee success.  

💡 Meta has seen both wins and misses with its other standalone apps:

• Threads was a clear success, hitting 100 million users in just five days and surpassing 275 million monthly active users in its first year.
• Other attempts, like Lasso (its TikTok clone), Poke, and Forecast (also a prediction market app) didn't quite take off.

💡 Getting people to adopt a new habit, in a brand-new app is much harder than simply driving installs. And with the “play” money in the Arena app right now, it’s hard to know whether this will actually compete with big players like Kalshi and Polymarket... or face thesame fate as Lasso and Forecast.