In 2012, LinkedIn was hacked and at that time hackers had leaked 6.5 million encrypted passwords online.
Now with this sale offer of 117 million login credentials, their fears have come true.
People may not have taken it very seriously back then as it was not spread.
To my knowledge the database was kept within a small group of Russians.
Motherboard quoted a LinkedIn spokesman as saying the company was looking into the incident.
source: www.techworm.net