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You will probably make more friends by commenting. Keeping everything you do interesting is the hard bit. I stick to commenting about stuff I know about so I'm on topic. If someone finds your comment interesting they are more likely to visit your blog so it gives your blog more chance of growing in value. About 85% of what I do is comment only 15% posting. That works for me because I find it hard to think about something to post whereas to comment the prompt is already there, I only have to find something that I'm interested in on my feed, There are lot's of different topics so you should be able to find something you like.

I think it's both. In sense of blockchain posts and comments are equal :)