I would not call this a threat, I would call this a "friendly reminder" or a warning. The OHA members agreed not to make devices with incompatible versions of Android, Google simply pointed out that Aliyun qualifies as an incompatible version of Android. They can't take Alibaba to court for that because Alibaba has not agreed to not ship devices with incompatible Android implementations.
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Yes, they can take Aliyun to court for that, but why are they threatening Acer here?
I would not call this a threat, I would call this a "friendly reminder" or a warning. The OHA members agreed not to make devices with incompatible versions of Android, Google simply pointed out that Aliyun qualifies as an incompatible version of Android. They can't take Alibaba to court for that because Alibaba has not agreed to not ship devices with incompatible Android implementations.