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people can find ways to turn any way of communicating on a social platform into a way to spam and abuse other people. this is expensive and difficult to moderate. on the other hand, a minority of users post most of the content that people actually want to look at.
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the conclusion, which most platforms are slowly arriving at, is that running a social network is a bad business to be in, and actually it would be better to run a TV station.
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(ideally this TV station is one which is personalised for each user, and even more ideally it's one where you don't actually have to pay to make the shows)