<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjMtMDIvMzM5YWI3NzYtNTc0NS00M2U5LTlkZTktNDAzY2YzYzc1Nzg1LmpwZw==.jpg"></p><p>The San Francisco-based cryptocurrency exchange referred to its "listing standards" in a tweet.</p>