In reply to CW.

I typically read gardening and recipe blogs. For those particular niches, comments add a bit of authority to the post. For example, if I'm reading a particular recipe that says use 1/2 a tsp of salt and a few commenters say to double that, I know I may need to adjust the recipe. That conversation helps the blog owner and readers.

For other types of blogs, it depends. But, for cooking and gardening, I like to hear what folks say.