Yeah it's not like they have a long track record of being caught red-handed stepping all over privacy regulations and snarfing up user activity data across their entire range of free products...

They weren't supposed to do anything with our gmail data as well. That didn't stop them.

[citation needed]

Read their TOS.

If it’s in the ToS, then it’s not true that “[they] weren't supposed to do anything with our gmail data”.