Reputation Product Development interview questions

Originally contacted by a recruiter for an opening at this startup. Selling points were charismatic founder, a lot of publicity, nice offices, etc. Had two phone interviews with the hiring manager. During the first one, the HM was over 20mins late. Scheduled a follow-up interview to present ideas/feedback on their site/svc. During the second interview, the HM indicated that more detailed feedback was required for their svc post-login. Up to this point more than 2-3hrs of time has already been spent reviewing their site and writing up feedback. Agreed to send a follow-up email with more detailed feedback about the service. Haven't heard anything since sending the follow-up email from neither the recruiter nor hiring manager. Reviewing their site about a month after the fact, noticed that many of the ideas/feedback originally provided to them during the interviews, had been incorporated on their site. That should be a lesson to never/ever work on spec if you value your time, effort and intellectual property. Overall, a rather unprofessional experience.