This is sort of shock to hear but not surprising I think due to bitrex doing it for 32 cryptocurrencies a little while ago
https://cointelegraph.com/news/crypto-exchange-bittrex-to-block-us-users-from-trading-in-32-cryptos

And now the other major crypto news media outlets are reporting the exact same thing. So it is official for binance to cease serving us based customer in the 4th quarter of the year.
https://www.coindesk.com/binance-exchange-to-block-crypto-trading-for-u-s-customers
https://techcrunch.com/2019/06/14/binance-begins-to-restrict-us-customers
Very bad for these customers who have used them during the years with performing their cryptocurrency exchanges on their platform.