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Dark pattern abuse at its finest. You find this on all third party webstores that have decided to affiliate themselves with Shop. This has been spreading like the plague and infected a lot of webstores I used to use. If you don't notice or forget to click on the "not now" at the bottom of the page they will create a Shop account that contains your email, phone number and credit card information without further warning. Whoever hacks into their database is going to hit a goldmine. You might have a Shop account without even realizing it right now.
And of course there is a 30 day delay for account deletion for purely made up reasons.
By the way, I also fucking hate that these awful companies are now naming their shit with misleading names. If you don't spot the capital S here, you might think, it's an account at the website that you're shopping on.
Klarna also has a payment method, which is called something like "direct transfer". When it's included on a webpage, they don't have their branding or anything next to it, to make you think, it's a normal bank transfer, when it's not.