Is it pointless to comment on blogs with 0 comments?

Do you comment to blog posts that are not just published, but don't have any comments yet?
From my experience, most of them never get approved. And i'm talking good manual and on topic comments here. There is so much spam, that most of the blog owner doesn't seem to be even checking their comments queue. What's your success rate with that?

Which leads to the next question, what's your method of discovering on topic blogs that actually have some comments already? (using ScrapeBox or manually)

it's just as useless as posting comments on threads with zero replies... oh wait.

If I am going to invest my time creating a quality manual comment, the "page" has to have a PR of at least 2 and I check to see if any comments have been approved with anchor text as the user name. There are too many high PR pages out there that you can comment on and get approved easily, don't waste time commenting and then hoping that your comment will get approved.

No way! if it's ******** and a high PR just write your comment manually! Maybe you're lucky