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I close it immediately when there's no other option to sign up via email. I don't understand the FB lock in. Anyone who wants to sign up via email alternatively, would probably be fine filling out a list of interests. TBH, I'd rather fill out the interests myself instead of having this app pull god knows how many I have saved in FB now.

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I don't "understand" it either, but I'd imagine their line of thinking is that you've been using facebook for years, liking things you like, going to movies/shows you like etc that won't end up on a form you fill out. People want to be done with the form filling portion very quickly and won't put in very much detail. When scraping your facebook data, they get a very large amount of personal data and they figure they have a better chance of linking people together who actually do have several common interests, instead of: "I like music, and movies and the outdoors"

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