If you read the ad carefully, it's only 10% off for US customers. How about rest of the world? So much for Bitcoin Black Friday.

We can't make this stuff up.
If you really read the ad carefully, you would have noticed this:
Not in the US? Dont worry, you can still use Name Your Discount to save 20-30% off Amazon, just by copying and pasting your wish list.
(EU people can at least use Amazon.co.uk)
I wouldn't take the 10% anyway, I would just wait 2 days for a 20% discount to fill and they ALWAYS do.
Remember,
It's about sharing