I'll start with the TLDR: it was intentionally implemented and pushed by LinkedIn.

It was company driven actually and we encouraged both individual users and customers/companies to follow suit. We even had tools that helped produce curated content for the clients. LinkedIn realized that they could drive higher engagement rates on the LinkedIn platform when users and companies posted emotionally charged content rather than "stale and stuffy" business content. They called this "being (or showcasing) your authentic self" and creating emotional connection. I was told to tell customers to do this because it made them not a nameless, faceless company and allowed potential clients to form an emotional connection. However all it seemed to do was to help companies hire from a specific political ideological pool.

LinkedIn was actually on the verge of shedding their 'publishing' and 'groups' portion of the platform until they realized that they could drive higher post engagement, which increases traffic which increases LinkedIn utilization. Now they had the audience and decided not to scrap the aforementioned and dumped huge money into both. Soon after came hashtags as well. And then came the 'curated and featured articles' and if you've been paying attention LinkedIn basically became CNN. I think it's spiraled now further than what they thought it would and I think it will eventually hurt them but that's why you see all the feelings and emotions and virtue signaling posts. It was a very purposeful and intentional effort on LinkedIn to do so.

I had a friend that worked with LinkedIns algorithm and she said she started noticing changes with how they weighted a post. Certain hashtags, keywords, behavioral patterns or identified political stance (yes LinkedIn knows your political stance. We're exactly like Facebook in that we track you all around the internet to see what you engage with. Additionally, we got caught scanning all of your emails too.

Actually our datasets are so scarily detailed we could tell an employer how long a specific employee would stay at a company with a +/- 3 month margin with a ~95% accuracy). Anyways she noticed that the algorithm which up to that point was largely based on engagement and performance no longer seemed to be the defining factor of whether or not a post did well. She found that known right wing posts, or right leaning posts were weighted lower and would quickly 'hit a ceiling. While other posts with certain themes, topics, keywords and such would sky rocket. They also had an independent content team, tasked with creating or highlight user created content. I forgot the name of the girl that led it but she had short green hair, punk goth type dress and a massive lgbqtia+! Supporter so you know where she was putting the spotlight in terms of content creation and user spotlights.

Internal culture of the company was so far left leaning, like I said before I scrubbed all my social media to ensure that they didn't know I was a republican, let alone Trump supporter because I was that scared of losing my job. They pushed 'economic opportunity for all' however with the way they talked about it, was very easy to see that what they meant was socialist equity, not opportunity. The recruiter platform can exclude job candidates by race, gender and age (new features introduced around 2019). They held mandatory diversity and inclusion meetings. Their version of diversity and inclusion was the villianization of white people, and the push for no boarders. The Microsoft and LinkedIn CEO would send company wide emails pretty much after anything Trump did. I remember one came out so quick that I almost thought it was pre-written, when Trump announced immigration changes the Microsoft CEO quickly shot off an essay to all employees about how evil Trump was to stop immigration, how he hates anyone who's not white, and basically told you what to think. mind you for a CEO it was mind blowing that he couldn't read the "legal immigrant" portion of trumps speech. They argued that boarders were racist symbols of hate and divide.

The CEO of LinkedIn at the time who literally everyone loved would host internal meetings that basically feelings and emotions times, and how orange man bad. Hell he even told us about the Chinese spy scandal and how they were working with news outlets to minimize and suppress the news coverage of it.

We also had a speaker series, where we were given free books and invited a speaker to talk to us and then a q&a. Mind you they were all incredibly left leaning. We had Chelsea Clinton, and world Bank leader to name a few.

Fun fact, LinkedIn was actually built off of Twitters code and platform. After LinkedIn actually got successful Twitter tried suing LinkedIn for them not to use it anymore however LinkedIn and Twitter were under contact for its use. But make no mistake all well adopted social media companies all work together in forms of presenting a singular message. LinkedIn despite legal battles with Twitter, worked heavily with them in terms of content. LinkedIn CEO was actively working with other social media companies to suppress Trump news under the guise of its "triggering people" and that "he's evil so don't give him a podium" while highlighting the saviors and the lovers that are the left wing party.