Hangzhou based SparkPool is the second largest Ethereum mining pool, controlling over 22% of Ethereum’s hash rate. As of Monday, however, it has announced that following regulatory policy requirements it is suspending mining pool users both in China and abroad. A notice on the SparkPool website informs their users of the termination of their services: “We regret to announce that we will stop all our services at 12:00 UTC on the 30th of September, 2021. The detailed description of the process is as follows. Please read it carefully and make preparations in advance.” SparkPool initially limited its shutdown to Chinese…