Add them. I'm blogging since 9 years now, and I find comments to be incredibly important. If you are doing a private tech blog, the people you want to reach are

Add them. I'm blogging since 9 years now, and I find comments to be incredibly important. If you are doing a private tech blog, the people you want to reach are people that want to follow you personally. With those you really want to talk, and an occasional comment helps a lot against that impression that no one is reading it. Even if it is just once a month. Though the most helpful thing for a blog such as this is to write it for yourself. But even then, some external feedback helps.