PayPal definitely asks for a full address when you sign up or pay by card directly. And I don't know about Kickstarter, but I just checked Indiegogo which I reg

PayPal definitely asks for a full address when you sign up or pay by card directly. And I don't know about Kickstarter, but I just checked Indiegogo which I regularly use, and they require a full address for billing. My understanding of the system is that usually the address can be wrong so long as your card/connection/purchase/etc doesn't look suspicious, but different payment processors have different fraud profiles, so some might pay more attention to the address than others.