Using 100 volunteers armed with Series 60 phones (like the Nokia 6682, pictured), the Nokia-funded project tracked such data as incoming and outgoing calls, Bluetooth activity, and approximate location (via celltower ID data).
All of these factors mean that the data Google releases should be taken as at best an approximate indicator of the level of government data and takedown requests submitted during the period.
Through its cooperative data model, Sageworks collects financial statements for private companies from accounting firms, banks and credit unions, and aggregates the data at an approximate rate of 1, 000 statements a day.