Well not just content moderators, but he gutted Trust and Safety and the content moderation function of the company, which is surprisingly larger than the moderators themselves. Having worked peripherally with similar departments that had multiple teams, even though a lot of it comes down to human moderators, there is a ton of technology around the moderators, and even more keeping the content getting to them in the first place.
Firstly, this is a red queen’s race because like security, new types of unwanted content, threats and risks keep arising as the information (and misinformation) landscape and overall zeitgeist keeps shifting. The work is never done and the best that can be done is to build platforms and frameworks to streamline it. There is also a lot of fractal complexity everywhere.
E.g. there’s a ton of technology needed to support the moderators themselves. Infrastructure like review queues to enable them to rapidly handle content classified by type, risk level and priority. Like Jira but not Jira because it can’t scale to the number of queues and issues involved here. So you basically re-implement and maintain a Greenspun’s 10th rule version of Jira.
There is still a huge amount of invisible complexity beyond that. For instance, you need to manage how much of a certain type of content gets exposed to a given moderator because some types (CSAM, gore) lead to burnout and PTSD. You also need to blur these things.
(Also the same type of content often gets reshared, so you need things like reverse image search to auto-filter that, because running the whole pipeline each time is expensive.)
This of course necessitates a ton of machine learning. Because risks keep shifting, and (pre-LLMs) each type requires the entire ML lifecycle and related infra: collecting and cleaning data, building classifiers for them, deploying them, seeing how well they work, and tuning them, and then replacing them when the bad actors eventually adapt to newer means.
ML is also of course needed for bots, spam and scams, which keep evolving. Entirely different techniques here though.
Then there is all the infra needed to handle the fallout of moderation. Counting strikes against users, dealing with their complaints, handling escalations, each case with a long history of interactions that needs to be collated for quick evaluation. Easier said than done because of course the backend is not an RDBMS but a bunch of MongoDB-alikes because webscale.
And all of this is a signal for the ranking used for feed, the main product, which keeps evolving, so a ton of “fire and motion” happening there. You introduce a new feature in the feed? You just introduced a dozen different abuse vectors.
Then there are policy makers and the technology needed to support them. Policy is always shifting as the landscape is shifting. This also includes dealing with regulations, which are also often shifting and require ways to deal with legal requirements and various legal systems like NCMEC. And this varies by jurisdiction. Like not just by countries, sometimes even by states.
(Funny story about NCMEC – it has an API to report CSAM, but I could not find it. So I googled something like “child porn API” and got a blank results page. Pretty sure I’m now on a list somewhere.)
I could go on and on. And I wasn’t even working in this area, just supporting these teams! Admittedly in our case I'd put the relevant headcount in the hundreds and not thousands, but our scale was also very different. For a company that is ENTIRELY about user-generated content at massive scale, up to national-level events like Arab Spring -- even if there was a lot of bloat -- I would not be surprised to learn this function was the majority of the workforce.
And Elon killed pretty much all of this. And, well, we see the results everyday.