Took me a while to figure this out when I started. Here's what actually works:

• Hold exchange tokens: BNB on Binance (25% off), OKB on OKX, BIT on Bybit
• Use limit orders (Maker): Way cheaper than market orders (Taker). Takes some getting used to, but worth it
• Find a referral code: Some influencers have permanent fee discounts. Just ask around in crypto communities

I do the token discount + limit orders combo. Saves me like $50 a month — that's a nice dinner.