What are the principles that are driving the behaviours? The mainstream empire builders always want to control and limit people within their own boundaries so that they can be more certain of outcomes - with particular reference to outcomes that relate to government. E.g. You don't need to be seen to be censoring one particular political group - you can get away with censoring all political groups but pointing people to lamestream who are well versed in appearing to be diverse but actually only ever covering approved topics/narratives. It really is centralisation vs decentralisation or 'david vs. goliath'. The difference, though, is that there isn't just one 'david' - there are billions of 'david ants' - way more than can be controlled. We just need to stop being good self controlling ants. ;)