Infochimps, Qlik, DataStreamX, qDatum
As you can see there are marketplaces for different needs. But which company did sell my data, though?
We can not tell you something about advertisements which you received as a result of past registrations. But with his ‘life pro tip‘ the Reddit user mc1nc4 hit the nail on the head. It paves the way for more insights on your future registrations:
When you sign up for anything online, put the websites’ name as your middle name. That way, when you receive spam/advert emails, you will know who sold your info.
If there is no input field for the middle name easily extend your first or last name. The name in the salutation doesn’t fit the companies name which sent you the ad? Et voilá.
It’s so easy to get things straight concerning where the advertisements are coming from.