I think the author just made this up in an hour with some weak arguments.<p>No doubt LinkedIn is becoming very spammy from all the puzzles and (gasp) personal stuff like &#x27;My son-in-law is having an operation, please pray for him&#x27;.<p>However, the value that most people derive from it and the ease with which you can ignore the spam will keep it being used until there is non-spammy, non-recruiter funded and &#x27;open networking&#x27; alternate.