Firstup Project Manager interview questions

The woman I was speaking with at first was really kind and easy to talk to. I had a phone interview that was pretty easy and only included the standard questions about background and experience. She told me that I was just the sort of person they were looking for and she would send an email with further instructions. The instructions were that I was to write a hypothetical email to their "influencers." I wrote this in and sent it far before the deadline. After I didn't receive a response for some time, I emailed to ask about the status of my application. They said they would be in contact with me and that was the last I heard. It has been several weeks and I have yet to hear back. This is incredibly unprofessional, in my opinion. When someone has gone through two steps of the interview process, I believe the polite thing to do is to let the candidate know whether or not they have gotten the job. Certainly they know what it is like to be looking for a job, why not treat people with some decency and respect?