@nadiaalbelushi I'm puzzled by this characterisation as it's so far from my own experience over many months of being there.
There are shedloads of academics talking about academia all day. The default feed is chronological, as here, and users have a wide choice of algorithmic feeds to find content outside their circles meaning there's no single algorithm everyone will be using. The most popular algorithms certainly don't favour the biggest users either and are highly diversified.