I’m convinced that everyone pissed at the company for users reusing passwords has a reading comprehension problem because I definitely already answered your first question in the comment you responded to.

I haven’t used the service either - I don’t want more of my data out there. So I can’t answer the other questions.

Users were probably not thinking about the implications of a breach after sharing but it stands to reason that if you share data with an account, and that account gets compromised, your data is compromised.

We’ve all been through several of those from actual hacks at other companies (looking at you, T-Mobile). I refuse to believe people aren’t aware of this general issue by now.