Each checker will not do the digging themselves, rather, companies like Palantir will offer info products like "Individual Troll Quotient" or "Online Political

Each checker will not do the digging themselves, rather, companies like Palantir will offer info products like "Individual Troll Quotient" or "Online Political Summary" which will be used in the same way credit profiles are for lending. This already exists above board with systems like Klout, and in the background a number of companies sell services like these to marketers.