https://gizmodo.com/5632095/justin-bieber-has-dedicated-serv...
--95% of anti-TWTR posters circa 2010-2016.
How did they do it? I know they used custom BSD servers so that a single box could keep close to 1M TCP connections open. I'm sure with a fixed target to aim for and all scope known upfront a small crack team of devs could do something similar for Twitter.