I got a fake job offer, but why?

Some time ago, I got a job offer via linkedin. It didn't trigger the usual red flags that I get from fake job offers - credible profile, some posts, a company with a German domain. It seemed legit to me, if it wasn't for the rather high advertised salary.

Anyway, I sent over my CV figuring it couldn't hurt, and got an invitation for an initial talk.

First weird thing: too many available slots, too far away. Like, two weeks in the future, but from 9:00-23:00 all free slots. So I picked one. Day comes and I miss it, and I get another one a few weeks later. One hour before the meeting, I get a message that the guy is on holiday, moved by another two weeks, to a time that is not convenient for me. Moved by another week. Few minutes before the meeting, moved by another week. I've only texted a guy on linkedin. Nobody ever phoned me. Weird. Seems fake - but why, what's the goal here, what was this good for? Should I be worried?

(PS I have job now, that I'm really happy with, so all good. I'm just curious...)