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Why is it illegal in Europe? Klout analyses your Twitter interactions which are publicly visible.

In Europe you it's opt-in by default. You have to explicitly consent to the creation of an account as far as I understand it. So, to me, they could scrap content but not go as far as create automatically an account without your consent. Or I misunderstood something and would be glad someone explains it to me.

I don't think they create an account for you, they just compute a score based on your activity on social media accounts you already have.

So if you have a twitter account, they can generate a score for the twitter user using publicly available information and then if you sign up to klout, link these existing calculations to the newly created account.

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