By adding the message that they did, they can signal to other miners that they're not really supporting bitcoin cash, but are blocking downward difficulty adjustments. (coindesk.com)
The sad part is that it only works for the ethereum blockchain mean it not support bitcoins or other altcoins. (techllog.com)
Among other features, Coinbase supports bitcoin payments for online store purchases using Fold mobile app. (coinfox.info)