It appears to be opt-out for Google Analytics. Source: https://github.com/ampproject/amphtml/issues/21163#issuecomment-468054382 https://github.com/ampproject/

It appears to be opt-out for Google Analytics. Source: https://github.com/ampproject/amphtml/issues/21163#issuecomment-468054382 https://github.com/ampproject/amphtml/issues/21163#issuecomm...