No user ever had a real use case for seeing a button that says "invite X" that doesn't send an invite on the platform, but instead sends an email to X who doesn't have a Linkedin account.

And if you decline, it asks you again. Two times using different wording.

You'll be surprised how many features "tech" people think nobody uses (Like a share button on a website), are actually very popular. That's likely the reason that feature still exists as everything is most likely A/B tested to death.

I was not only talking about that though, but also that they can build shadow profiles and recommend people to you that way.