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It’s the size really. As with most social media platforms, often they are fairly easy to create (YouTube definitely isn’t, but many could). Problem is that it’s impossible to compete with, because people expect the activity you get from hundreds of millions of users.
Same goes for Twitter, Reddit and whatnot. Since capitalism took over the internet completely, basically none of the large plattforms have been outcompeted really.
To big to fail isn’t the banks nowadays, well then to, but it’s IT as well.
Germany is the 2nd / 3rd largest contributor with about €15 billion. And you bring up 5000 helmets? That’s just pathetic and false.
Also, make sure to use per capita numbers.