It will be an interesting post mortem if they make it public.
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Unfortunately, they're huge, and I doubt the Swedish authorities will do more than give them a fine and a slap on the wrist.
Here in Finland, It's not uncommon to have no debt apart from the mortage on one's home.
I use them because consumer protections with other methods aren't as good here in the States. Paying with a credit card, if I have an issue with a vendor, after a good faith effort on my part to resolve the issue, I can just ask the credit card company to deal with it. (I don't abuse this, but I don't doubt there are people who do.)
There are better and worse credit card companies for this. American Express has great customer service but they aren't accepted in as many places.