A handful of SDN-listed swimming pools nonetheless have an “operator” permission. Of these, two belong to incredibly old, now-unused variations of Tornado Cash. The remaining pools either have more recent, immutable variations, or had been utilized so small which they have been possible overlooked in the May 2020 closing update. https://b3163.com/how-tornado-cash-enhances-privacy-for-ethereum-and-bnb-transactions/