First of all, the email is legit as far as we know. If this were a phishing campaign we would have known about it by now (remember those leaked LinkedIn passwords last year?).
The thing that puzzles me and others is that fairly new and/or passive users have received this email, how is this possible? Nobody knows how LinkedIn have calculated these stats.
The whole thing is obviously a great PR opportunity for LinkedIn, almost everyone that got sent this tweeted, shared on LinkedIn and other places about how popular the are. Some even think LinkedIn were being unethical with the whole mailshot.
If you have any further thoughts, let us know at @linkhumans or leave a comment here!
PS. Clarification from LinkedIn received:
“We have reached out to our members who were one of the first to have become a member, who have had the most profile views, who are the most connected in the world or a specific country, and our members who have received the most endorsements. From our 200 million members, we looked at those who have active accounts and were within the first million to register, have more than 100 profile views (excluding self-profile views), have more than 100 connections, and have the most endorsements for popular skills in their country. Unfortunately we aren’t sharing specifics around the details which make up this number, but want to thank you for being a part of the LinkedIn network.”