Kickstarter's payment needs are pretty different from other crowdfunding sites, as the credit card is authed right away... but not charged until the project is funded AND the deadline is reached (up to 60 days). There are very few payment vendors that will hold a conditional credit card charge like that, and certainly not any that will hold off on charging the card for 60 days.
Amazon Payments recently announced that they are going to stop "boarding fresh crowdfunding accounts at this time," and also kicked book crowdfunder unglue.it off their payments platform. Amazon's explanation was that, "we have regulatory obligations as a licensed money services business for how we operate."
In order to expand beyond the US, Kickstarter needs to either wait for a major payments provider to support their unique payment requirements... or to build up their own international payments provider. It's hard enough building a startup; building a second payments startup is a huge additional endeavour.
In short: payments is often much harder than it seems. It's not just a matter of translation and miniscule expenses... there is real engineering work required to tap into international payments and understand how payments work on a country-by-country basis.
Do you have a reference for this? I'm under the impression they only charge the cards once the funding goal is reached. Amex in particular only allows pre-authorizations to last up to a week.
1. If the project has met or exceeded its funding goal, all backers’ credit cards are instantly charged and funds go directly to the project creator.
2. If the project has not met its funding goal, all pledges are immediately canceled. And that’s it.
Amazon Payments is the only processor that currently supports these requirements, and currently Amazon Payments does not support non-US recipients — meaning that you need a US bank account and address to launch a project on Kickstarter. >>