Coinbase neither prohibits nor endorses our customers’ lawful use of any third-party exchange service. Nor do we necessarily prohibit our customers’ sale of bitcoin in peer-to-peer transactions for personal, non-business use.
Coinbase customers may not, however, use their Coinbase Accounts to engage as a business in the exchange of virtual currency for fiat currency, funds, or other virtual currency. Coinbase reserves the right to limit your account use if we detect activity which constitutes a violation of this policy and/or our User Terms. We further reserve the right to limit your account use if your account is associated with high-volume activity inconsistent with personal use.
Source:
https://support.coinbase.com/customer/portal/articles/1905681-localbitcoins-and-coinbaseIn News:
Coinbase Is Tracking How Users Spend Their BitcoinsUow, I wasn't aware of that. Thanks for the heads up!