As a US-based exchange, Coinbase is required to report earnings to the IRS. For this reason, they will provide customers with a 1099 form if they have made over $600 worth of trades in a calendar year.
This is important for customers to be aware of, as they will need to report their Coinbase earnings on their taxes. Failure to do so could result in fines or other penalties from the IRS.
Overall, Coinbase does give 1099 forms to customers who have made over $600 worth of trades in a calendar year. This is in line with their tax reporting requirements as a US-based exchange.