Pre-interview to only talk about initial level of interest, not a formal interview yet. There is a possibility of touch-base in the future for this opportunity when they expand in this specific area.

I was contacted by a recruiter. After the first round of technical interview I was told that my skill set does not align with the requirement. But still they would like to continue the interview process ( a big red flag). I went through 5 rounds of interview and only to be told later that they don't have a matching role at this time. That was really a big waste of time. They were aware that my profile did not match still they scheduled 6 rounds of interview. This was a very bad experience.