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I think it's not danger to democracy. Its dangerous to their view of democracy. Facebook is a free platform on which everyone can express their opinion. ....
Facebook is not "free."
The item bought and sold on facebook is you.
It's "advertising" and is an affiliate of some sort, right? I think that's a great way to market your own product and yourself whenever you have your own stuff going on. At least there is a channel that you could go into and start advertising in it.