I wanted my blog to be me, so I don't use lots of links or anything in my posts, and a lot of my links go to my own stuff anyway. It's supposed to be more of a personal blog.
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tho, mine is kinda neglegted right now. Poor thing is always last on the to do list lol.
I did it more to be a source of traffic to my other sites than to make sales off the actual blog posts, although I do have paysite links in the sidebars.