I'm pretty active on Kickstarter, backing multiple projects.
What's really worrying is that the Kickstarter folk didn't detect the breach themselves. It was law enforcement (I'm assuming FBI) who contacted them about it.
On the security notice, Kickstarter writes they "set a very high bar" on how they serve their community. What a load of crock!. If they had a high bar this would never have happened. I wish they wouldn't rub salt in the wound by publishing such blatant rubbish.
I'm extremely disappointed with Kickstarter right now.