I was reading somewhere they can acquire so much information even by the way you swipe your fingers on a touch screen. I haven't owned a phone for 6 years, no socials since basically ever but I still used Facebook lightly to contact schoolmates or friends. You most likely have thousands upon thousands of unique microexpressions. For example if you are thinking the word 'Aligator', even that will have a specific impact on how you swipe the touchscreen. If you had a powerful enough Quantum computer to decode and analyze all of this information I don't see why it wouldn't be possible.
Sometimes on Youtube a video will popup and I was literally just thinking about it 30 seconds beforehand. Who knows maybe just by your cursor movement and pauses/breaks they have found an algorithm that decodes these subtle subconscious movements into a lot of information.