If they want to do something with your data they just change the terms before they do it, it is so easy and consequence free to legally abuse this that I'm not sure why you think they would do it the illegal way.

Can you give an example of when they did this to retroactively shield themselves.

I don't think people understand that while consumers are dumb, uneducated, and broke, enterprise is a cash cow with a experts and a legal team.

If you serve them, like Google does on a massive scale, these ToS "gotchas" will do you in faster than you can say "lawsuit".