I thought Open Handset Alliance partners couldn't sell devices running a true Android fork without losing Google as a partner? How will that come into play here?
The trouble aliyun/acer ran into a while back was because aliyun actually changed the API, so that it couldn't run android apps. I can't imagine why Ali would have done that, and I can't imagine any reason why Facebook would purposefully cut themselves off from the android ecosystem. I'm sure HTC won't be running afoul of the OHA with this.