I was just talking with a consulting client, who I suggested to use Thunderclap.It to build up awareness and help out with social media in the pre-launch phase. He said it was super helpful and they ended up achieving a reach of around 1 million.
I have never used this and to be frank I am hearing this for first time. That is why every time I am here to learn something new and want to learn many things to be perfect when I am ready for my first campaign.