I've been a Coinbase customer for a couple of years but recently I got the following message after I made a transfer to an online sportsbook. "Our records indicate that your account may be involved in transaction(s) related to online gambling. Please be aware that pursuant to Appendix 1 of our User Agreement, Coinbase Services may not be used in connection with online gambling (https://www.coinbase.com/legal/user_agreement). If you have sent bitcoin to an online gambling site or have received bitcoin proceeds from online gambling, please be aware that this is a violation of our Terms and we respectfully request you cease such activity." Has anyone else received this?