Two out of 1044. Eight people also decreased their pledges after we hit our goal, which took me aback for a moment—before it made me retroactively extra grateful that people had given beyond their comfort zone just to help me cross the finish line.
Six days since the end of my project (tgf.fm/ks), 15 of my 1044 backers haven't gone through. I think a bunch have fixed credit card errors over the last week. Three of the nine biggest pledges had their cards declined, likely because of the giant charge to an unfamiliar vendor—but those folks have been in touch directly to resolve the issue.