http://valinet6l6tq6d5yohaa6gdsf2ho4qcqcxyj2nahp5kd4z7nsa6ycdqd.onion/2020/12/02/Whats-the-point-of-Disqus-option-to-disable-tracking-cookies.html
From what I understand, this merely prevents the comments section on your web site from setting the said tracking cookie. Although if you visit some other web site that embeds Disqus and has not set this option, or even Disqus itself, a tracking cookie will still be placed on your device.