How much in crypto trading fees does Binance take each day? The 24h on the BTC/USDT pair has 311M dollars worth on it.

Considering there is approx 0.3% fee that would be around one mill from that pair alone. But then again, it's not that easy to build and assure security. More than that they are providing liquidity for the market as long as there is no convenient dex'es.

Some day, presumably that would change, and they will launch a proper dex themselves. Which i am sure is already developed and ready to go, but who would kill a milking cow from a business side perspective.