These "internal" purposes included growing your social network, monitoring or reverse-engineering the algorithms of competing search engines, and now, it includes training ML.

Which is funny given that when others are doing it to them, they go to great lengths to stop it, and sometimes complain loudly or threaten lawsuits.

I think the main reason the big players don't sue each other is that it's a bit of a Mutual Assured Destruction kind of a deal. Google is doing it to Microsoft, Microsoft is doing it to Google...