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I thought Blogging earned more ?

I can only speak for myself based on my experience. It is more effective / responsive when I comment on other people's posts than writing a blog and hoping some will read it and vote. I also have not posted anything controversial and hence have not generated much traffic.
However, when I commented on other people's posts, it was often adding or different than the one stated, just like this comment on yours. ;-)
It at least received a reply, although, I make it a point to upvote a well considered or written reply regardless of agreement of the same or not.
Note: my upvotes here...

I like to do both but only hete for 12 weeks now so.... but good luck to you !