Disqus – All Comments Must Be Approved First

I used the fact that the {PostID} variable is empty for static pages.

So declare a CSS class like this:

.hiddenOnStaticPages {
    display: none;
}

Then wrap the comments link (and the actual comments) in a div like this:

<div class="hiddenOnStaticPages{PostID}">
Comment HTML goes here...
</div>

It's managed in Disqus settings, not on Tumblr.

1. Log into your Disqus account
2. Go to the account that needs the change (the first page when logged in is the dashboard)
3. Click on Settings (the right-most tab)
4. Click on Appearance
5. Scroll down to the Comment Count Link group of settings (almost at the end of the page)
6. There you'll see three editable text fields labeled Zero Comments, One Comment, and Multiple Comments. Change the text in them to whatever you want.
7. Click the big blue button Save Changes at the bottom of the page