Steam

I didn't expect the Lemmy privacy mindset to go so far; competitor analysis is a thing in business, and when you aggregate such data you can also analyse industry trends and your business's position in it. I don't see why it's a boundary?

Myriad reasons. Guarantee Apple, Google, Sony, Tencent, and others on that list maintain a similar list.

Why is Microsoft, of all groups, monitoring Valve’s profits?

https://www.pcgamer.com/microsoft-would-buy-valve-if-opportunity-arises-said-phil-spencer-in-leaked-email/

They're both into gaming hardware and game distribution. Companies pretty much always watch what their competition is doing.

Xbox