As I never heared of thunderclap before, I just read about it and want to summarize what it does:
We need to get at least 500 participants, to give the thunderclap plattform access to their social media accounts like twitter. When 500 is reached, the owner of the campaign can use the accounts of the 500 participants to spread messages to a huge audience. A bit like a DDoS This has been invented based on observations at protests where the leader dictates a hook-line and the crowd repeats it.
I am not sure if this will help the kickstarter, but I would participate for sure.