How much does Coinbase earn cost?

Excuse me, could you please clarify what you mean by "earn cost" when referring to Coinbase? Are you asking about the fees that Coinbase charges for its services, such as buying, selling, or trading cryptocurrencies? If so, Coinbase's fees can vary depending on the type of transaction and the amount being processed. For example, buying or selling cryptocurrencies using a bank account or wire transfer can be less expensive than using a debit or credit card, which may incur additional fees. It's important to review Coinbase's fee schedule and compare it to other platforms before making a decision. Additionally, it's also important to consider other factors such as security, ease of use, and the variety of cryptocurrencies available for trading.