If they're already snooping on the links between data centers and picking the data up using other means then they don't need to make any requests from the compa

If they're already snooping on the links between data centers and picking the data up using other means then they don't need to make any requests from the companies while they're actually "investigating" things. The only reason they would need to give them a reason why they have information they shouldn't have- basically, when they need to bring something to court. These reports are useful only in that they show how much the company is in bed with the government versus how much they're just getting abused. You don't see these types of reports from the phone companies, for example, because they've been helping the government snoop for years.