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The internet is quietly becoming a walled garden.
(reddthat.com)
For non-fluff, non-yaoi fanfiction.
Use tags at the start of a post, enclosed in square brackets, to distinguish the content type. For example, use tags like [Discussion], [Recommendation], [Self Promotion], [Writing Help], [Fic Search - Specific], [Fic Search - General], etc.
Avoid promoting content that is behind a paywall.
The main purpose of the community are recommending fics and requesting recommendations.
I don't agree that this is a corporate problem although corporate interests may influence the way in which the walls are governed. It is more a problem of the many facets of human nature that will lead to protection of ones own beliefs. Many "groups" of people have varying levels of tolerance for debate and so adding a level of sanitization will help in you being able to engage with them. I think being respectful and empathetic will keep the walls at bay. Sometimes though (which I have experienced as well) you'll be dumbfounded as to how your comment could have been construed completely out of step with your intentions. In that case provide a reasonable appeal and then move on if you don't get satisfaction. People be different.