[vijayaggarwal]

People tend to overvalue money and undervalue time, and that's the reason "free" services tend to beat "paid" ones in any business where per capita cost of service is low. So, while LinkedIn generates spam, it's not much vulnerable to a "paid" competitor.

[sj4nz]

This is so very true. Falls under the general guideline "If You're Not Paying for the Product--You are the Product." http://lifehacker.com/5697167/if-youre-not-paying-for-it-you...