Yes, it is possible; however, how can you pay for your employees and the servers? They need to make a living, and you can't expect someone to work for you for free. Also, consider the server and maintenance costs; many traders will trade here because it is fee-less. There are a lot of factors you need to weigh in. Yes, it is possible, but it is not practical.
This announcement caused panic throughout the crypto space. A lot of people resorted to selling their bags to buy more at a lower price. This resulted in a red market throughout the day.
The data would have been either from abuse of API's by third party apps or find your friend. From the dataset, it seems to be exclusively limited to the data immediately viewable on your profile, hence the reason so few emails appeared in this leak.
Hopefully, things are different under Satya, who wisely has kept GitHub at arms length.
But it is hard to think of other US large cap companies with such a record of being a Destroyer of Acquisitions.
Fifty years ago, the top 90% of the media was owned by a total of 50 different corporations; today just six corporations own that 90%. As a result, most of the news organizations owned by the same corporation will have the same viewpoints.
The media is becoming monopolistic, and we need to start enforcing the monopoly laws, with tech too. Maybe anti-trust legislation and litigation could be the way to address this nonsense.