Great call-out! Probably because most over 500 can’t allow exfiltration of data for security (banks, gov, corp secrets). From my understanding most, if not all, AI data sets are built from our data.
Google and OpenAI was caught (or opening saying) using web spiders for AI datasets, crawling public data from Wikipedia, Facebook, Reddit and more. Google even using data from Google Assistant and other opt-in data “to improve their products”.
I haven’t looked into Microsoft but they are also using OpenAI as they are a major investor for OpenAI.