Edison [1] (who was acquired [2] today by a company that sells your data to hedge funds) does precisely this too, except they sell all your data to third parties. Google at least keeps it in-house I guess?
There was a Tegenlicht [0] documentary on Dutch TV some weeks ago, on how pervasive data collection is 'revolutionising' how the stock exchanges and entire financial world operates. This data really is the new oil, and its analysis gives a headstart, advanced prior knowledge for traders that have early access.
Translated from Dutch: "The stock market should be a level playing field: everyone has the same information. But unnoticed, terabytes of data have entered the stock market. Smart companies dive into the mountain of data that is collected about us, in order to be able to see Apple's sales or the number of Netflix subscribers before the rest of the market does. VPRO Tegenlicht delves into the world of 'alternative data' to see who will win on the stock market, and who will not."
Translated with www.DeepL.com/Translator (free version)
Technology is awesome, but it's fallen into the hands of a bunch of god damn authoritarians. Trust absolutely no one. Paranoid should be your default behavior towards any files you have a device that accesses the Internet. There's 10,000 tentacles seeking that data.
Privacy is such an illusion.
[1] https://mail.edison.tech/
[2] https://www.edison.tech/blog/edison-acquired-by-yipit