They will surely still send all the data whether you are signed in or not. Maybe it won't be linked to a particular account, but it's a fair bet that it will st

They will surely still send all the data whether you are signed in or not. Maybe it won't be linked to a particular account, but it's a fair bet that it will still be linked to _you_. It's well-publicized that Facebook has shadow accounts for people who are not logged in to their service, and it's reasonable to assume that other large companies do this too.