I don't know why you use Disqus when there is an Opensource alternative: Glosa --> https://github.com/glosa/glosa-server
- it's yet another dependency on the back end (for a static site you may not even have a back end or a server you can install it on),
- it requires Java, which is possibly yet another dependency and platform,
- both of these need patching and updates
- I do not love comment storage in JSON because it complicates backups
- needs email configuration which can be something of a deliverability minefield, but Disqus handles this out of the box
Fundamentally it's more work/complexity than some people will be willing to put in. Disqus is easy. Just drop it into your relevant page templates and it'll work.