That's just standard address selling/marketing and common since decades. Data is split by region, age groups or interests. Have a look on http://shop.schober.com/ for example. Sadly everyday business in offline marketing.
This one happens to be more targeted, maybe crawling on mailing lists. The data might have been acquired legally (e.g. buyers of certain Linux software which agreed to some terms of service) or illegally.
This one happens to be more targeted, maybe crawling on mailing lists. The data might have been acquired legally (e.g. buyers of certain Linux software which agreed to some terms of service) or illegally.