Many salespeople use very blunt reach-out methods. Here are the three major fails that I see when people are reaching out to potential leads:
Yes, social networks give you access to a vast amount of potential leads, though do not fall into the trap of trying to reach out to all of those at the same time. Quality over quantity is the golden rule for social selling!
Therefore,
1) Define and target well your leads
2)Collect enough insights to make your reach out relevant
3) Dose well the number of messages that you are sending
Tell visitors a bit more about your campaign and explain why they should join. Is this a once in a lifetime opportunity? A special event with influential speakers? Or maybe there is limited space, and you want visitors to know so they register now to secure their spot.