<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDYvNDFmZjA1MTctOGEwNS00OTA0LWJhMjgtMGFkNjM5NTViNGY3LmpwZw==.jpg"></p><p>It follows a public letter from ZK researchers and top industry experts slamming the firm for “oppressive behavior.”</p>