An index is one token that holds a basket of others. Hold it and you collect a share of every trade, in ETH. Anyone can build one and earn from it.
Choose the tokens you want in your index, and set how much weight each one gets.
Triangle bundles them into one index token that anyone can buy and trade.
Every time people trade your index, the fee splits. Holders earn, you earn, and $3 gets bought and burned.
This is where the fee on every trade goes.
Split across everyone holding the index. Hold the basket, share the trading fees.
You called the sector. You keep earning while it trades.
Buys $3 off the market and burns it, so the engine token gets scarcer as the volume grows.
$3 is the token that owns Triangle. Hold it and you earn a share of its own pool fees, in ETH, just for holding. Every index trade and every launch auction buys $3 off the market and burns it, so as more sectors print and more people trade, more fees flow into fewer and fewer $3.