Atm true, but than you have to check your contact email adress at least one time in 30 days, if you don´t want to risk to accept accidental changes of the subscriber agreement. Or want to avoid the trouble and argue that you didn´t received the changes so far and therefore the 30 days period didn´t started. it can´t be that i simply miss the included nuance in your formulation, but i would say it a bit ifferent, like, if Valve gathers such information (eg Email adress), which are characterized as "personally identifiable information", Valve will not give them away / sell them (if not required by law or a court decision). Also that such information are stored in the USA. Individual information in sense of the policy may be shared with other parties and "may be used to improve Valve's products and online sites, for internal marketing studies, or simply to collect demographic information about Valve's users". The later are all data which would allow to say you are Player X and in extrem case no other player share this data profil, but no eg contact information or name can - without additional informations - won from this data. But like said, it could be that i misunderstood one or two formulation of you and didn´t saw their true meaning.