Perhaps, but if you read the thread you will recognize that I am referring to the OPs use of purpose.
So, in the alternate, you could say that it's purpose it to intelligently respond to natural language after hearing a wake word. A cynic may go further and suggest that the intelligent response will be determined in part by Amazon's ability to monetize the response.
Nonetheless, the design and intent are for the device to transmit language after hearing a wake word. If it operates outside that design and intent, this should be detectable if your router is secure and able to track outbound usage on a per device basis.