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I had very similar experience with Facebook when tried to check my profile. Out of 20 interests only 4 were correct

I think it is an intentional stretching the interests way to far to look better for advertisers.

In more details: https://levashov.biz/can-trust-facebook-audience-interests/

The idea of advertising is also to create interest where there is none. If you all of a sudden see an ad about those other topics your aren't super interested yet, maybe you will become. That's the idea of manipulation and marketing.

That's the kind of advertisement TV is selling, not what social media are claiming to sell.

Reply on news.ycombinator.com