You obtain friends.
If you're well connected, you obtain many ..
.. however, it's difficult to keep hold of them.
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The issue is friendship and human relations—while transactional during an exchange—are not transactional in the way recent app based culture has lead us to believe.
We maintain relationships. We need to tend to them. They change as time moves forward. We can pause; and pick things up later.
The best friendships involve high degrees of honesty, and because of that we need to be vulnerable at times. I'm not sure writing a blog post or tweet is displaying the necessary levels of sensitivity (at least on an interpersonal level) to meet this criteria.