Sharing knowledge doesn't require sharing publicly? You seem to be looking at blogging exclusively as a vanity/recognition thing. Meanwhile, I've come across numerous blogs that have helped me solve a problem. I don't remember most of their names, but it's the kind of thing where I'll recognize the website if I need to search for the solution again.
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Neither require sharing publicly (ie, blog). Other than for the vanity/upvotes/etc.
Sharing knowledge doesn't require sharing publicly? You seem to be looking at blogging exclusively as a vanity/recognition thing. Meanwhile, I've come across numerous blogs that have helped me solve a problem. I don't remember most of their names, but it's the kind of thing where I'll recognize the website if I need to search for the solution again.