How to Market a Book on Kickstarter

I didn't collaborate with other creators on Kickstarter even though I knew other authors doing campaigns at the same time. A couple of people asked me about cross-promotion but their campaigns were not at all related to pilgrimage. Post campaign marketing for backer email addresses and my tip is do a survey for everyone. All emails about the campaign go through Kickstarter and you don't have permission to just upload that list to your own email system and start sending more emails. This is about data protection and privacy laws.