Comment Re:Privacy means local storage (Score 2) 99
The major difference is that a company given a letter (not a subpoena) has no incentive to not hand over the data. It's not like consumers have ever shown they care (enough, via the bottom line). Companies know this. That's why Amazon shut down WikiLeaks with only a phone call (no subpoena) and no one cared that the government could just silence a website they disagreed with without even making a legal argument. That's why scuba shops handed over their customer lists to the FBI when asked, without a subpoena. There are so many other cases of companies thinking "well, it's not like the customer cares, we can be nice to the government and not even piss anyone off".
In the case of the subpoena, yes you gain nothing by storing the data yourself. In the case of a letter or phone call asking nicely, you have far more control. You can ignore it. A company may or may not.