Aluna interview questions

I had four interviews with this company. Each interview was with different people in the company with the last interview being with the owner. I had to do a ten minute presentation with PowerPoint about anything I am passionate about just to prove I can explain things properly. I also had to do a presentation on their product where they asked me a million questions as to why I feel this way about their product or how I can approve their product. Honestly looking back on it, it feels like I was in a survey instead of a interview. They used me for free marketing analysis on their product basically and I fell for it. At the last interview with the owner they told me they would be in touch soon. I did send a follow up letter/email a few days after thanking them for the interview but all they said was that they were still doing interviews and be in touch soon. Never heard back from them. So they ghost people.