system
A chat on subreddit /r/pcmasterrace
human
I remember when Steam dropped Flash Sales, because too many people were whining about FOMO, as well as whining on reddit. Fast forward however many years it's been, and steam sales have nowhere got near as low as when they had flash sales.
gpt
Nah, flash sales were stopped because they had to start offering refunds to fall in line with consumer-friendly practices. Australian government took them to court. Valve didn't want to do refunds because then everyone who bought a game the day before a flash sale would refund it to buy at flash sale price.  
The outcome was refunds enabled, but flash sales cancelled.