Jesus christ these headlines mislead everything.
They were using machine learning to try and figure out what people were buying. Machine learning has lots of errors until you train it. The “hundreds of workers” were training it by telling it what each thing was. E.g. it was creating training data for it to learn from.
The goal was to train ML enough so that humans were rarely necessary, obviously.
I work in IT. I can pretty much guarantee that server load for a game like this is nonexistent from a cost perspective. They’re not going to be using cloud services, they’re going to privately host because it’s way cheaper. Early days playercount woes were before they added more nodes to their solution. Whatever cost they had for servers is already paid. Electricity and facilities costs are whatever because they are paying it anyway. They can’t just fire the people maintaining their solution either but that’s also baby bucks compared to the money spent building this thing or marketing it.
Gaming protests of popular games never work unless the objective doesn’t alter the bottom line.