[ivan_gammel]

In fact you have the contract with the services where you sign up. Even if you did not read T&Cs, you have accepted them and only then your relationship with the service started on their terms. You are not just a row in the database, you are a customer getting service in exchange for something. You have at least opted in to their data retention policy, and you have to opt out explicitly. If services will be required to purge the customer data after period of inactivity by default, chances are high that free accounts will simply cease to exist. In any case, quite significant share of customers would prefer to opt out from purge and they will be important enough from commercial perspective to make this opt out default in T&Cs acceptance process.