It’s likely that you didn’t even know that LinkedIn had a blacklist! Im sure you recognise this invitation in which you select the category about how you ‘know’ someone.   LinkedIn make it clear that they don’t like you to invite people you don’t know, however they don’t make it clear LinkedIn’s punishment. Even when you click on the Find Out Why link it says: This part is completely understated.  In fact if five people say they don’t know you, you get ...