There are _some_ cloud accounts for linux such as Ubuntu One, which I would fear could have similar identification capabilities if ever forced by to do so by a 3-letter agency
Any sort of online service you're logged into is going to have your IP and account correlated with a timestamp. Dropbox, GDrive, and even your e-mail provider. While a device identifier might be more useful it's not like the lack a device ID will keep you from being tracked.
You can probably safely assume the 3-letter agencies are snooping on this data. It is and has always been very hard to resist government pressure. Happens all around the world, China, Russia, EU; all the geopolitical players find various means of eavesdropping where they can.
Also likely part of why ECH is taking such incredibly long time to see widespread adoption and why it's still quite a shit solution to SNI. As it stands, anyone with network level access can see which websites you are visiting, despite HTTPS.
I'm not trying to break the law, I use it for my corporate usage, therefore it is legitimate use.
What are you trying to say?