This article examines how digital currency platforms generate revenue through diverse income streams. Crypto exchanges earn primarily through trading fees, withdrawal charges, and token listing fees, while expanding into staking services, margin trading, and custody solutions. Understanding these revenue models is critical for traders and investors to assess platform sustainability, optimize transaction costs, and identify potential conflicts of interest. The article provides real-world examples from leading exchanges like Gate, analyzes industry trends showing declining spot trading fees and growing derivatives volumes, and explores emerging revenue opportunities. By comprehending these monetization strategies, users can select platforms aligned with their trading strategies, minimize costs, and make informed decisions in the evolving digital asset market.