The spam mails that appear to originate from LinkedIn are regularly caught in the company spam filter. I say "appear to originate" because I removed my work email address from LinkedIn some time ago so any current mails should not even be going there. I have suspected that some at least may have their true origin in the big identity theft last year.

Whatever the truth of this may be, I share the common opinion about "endorsements". Flattering as they may be, I often feel that I would not even endorse myself in some of the categories others have chosen.

As for "premium", I recall many years ago that Friends Reunited tried hard to persuade me in many emails that their paid-for level was worth having. After a period of studiously ignoring the mails, they stopped; I expect that LInkedIn will do the same.