Abishia: they know your name, address phone number and Email they tag it to a ID then they can analyses what kind of personal type you are by seeing your online gaming (if you are RPG fan you likely share more common ground then someone that play's shooters) this information is shared amounts 3e party's (sold data) which they can refine better understanding of your ID and have better commercial tags personalized.
StingingVelvet: But like... who cares? Why should I care that China knows which games I play and what my email address is? This is the thing "very concerned" people never really explain. Everyone knows Google takes your info and uses it for advertising, they just don't really care. You have to sell people on WHY they should care, but usually there's no real sales pitch for that. You just expect them to care on principle, and they don't.
Not really saying how right or wrong this is, but it's just a fact.
The "I have nothing to hide" argument is faulty.
Firstly, you have something to protect. In the Knowledge Economy, your (meta-) data is your capital. It may not be worth a lot on its own, but in aggregate it is extremely valuable. (We need digital unions to protect our means of digital production.) It is used primarily to train AI, but it has provided Cambridge Analytica, for instance, with sufficient information to deduce who a person voted for in a recent election (based on actual voting patterns and matching this personal information cross-referenced with registered voters).
Also, companies already rank you when you call their service department. If you are a "good" customer, you will get better service. If you are a time-waster they will lose your call.
Secondly, it relies on the safety of the free internet. (The Russian internet is owned and operated by the government, for instance, and they can intercept anything they want. Everybody has heard of the Chinese firewall, behind which citizens cannot read such divisive sites as Wikipedia.)
If you have the misfortune to live in an authoritarian state, you will be subject to interventions based on association; any conversations you have (
e.g., in-game chat) can be monitored for subversive clues. The independent journalist who revealed the virus outbreak in Wuhan, for instance, was arrested this week for alerting people.
If you remember the beginning of the Arab Spring, it was an individual at a Tunisian market stall who self- immolated in protest of the corrupt authorities confiscating his wares. The political movement (that brought down the government) spread through the social media. Nowadays governments are very wary of social media and monitor it to ensure such events are less dangerous to their rule. (India shut down social media during the recent farmers' protest against the changes to the law that removed the guaranteed purchase price for their stock.)