Ask HN: Kickstarter from Norway – disadvantage for US backers?

Kickstarter became available in Norway late last year. I launched my first project yesterday, a board game to teach the fundamentals of Lean Startup.

After 17 hours, I notice that I get a whole lot more Norwegian backers than US ones. It should be the other way round, there are a lot more US Lean Startup enthusiasts than there are Norwegian ones.

Norwegian Kickstarter projects list as every other project, but there are two big differences:

- Currency has to be NOK

- Backers must put in a new credit card

In your opinion, would this be considered a big barrier for US backers? Does it seem "foreign" and create uncertainty?

Here's the link, if you want to make up your own opinion:

https://www.kickstarter.com/projects/44846941/playing-lean