A few SDN-listed pools even now have an “operator” permission. Of those, two belong to quite old, now-unused variations of Tornado Cash. The remaining pools both have more recent, immutable variations, or were being utilized so minimal which they have been probably ignored during the May perhaps 2020 last update. https://hemysystems.info/why-tornado-cash-is-the-go-to-privacy-protocol-for-copyright-users/