

The myaddress+shop@gmail.com
should be trivial to defeat by a spammer. Its a very simple string remove/replace to get back to a stock email address, or change it to impersonate another service, eg. myaddress+netflix@gmail.com
.
It’s only useful for the actual service, after that, you can’t rely on it.
Alphonso is listening for TV sound signatures, which while definitely intrusive and privacy invading, is not the same as 24/7 listening for voice-to-text-to-ad purposes.
They would only need to listen for a second or so to determine what channel you are on, instead of all the time, so there is a massive difference in scope.
They are effectively shazaming your TV.
Still creepy and invasive, but not 24/7 recording invasive.