Refinery29 interview questions

Had and initial phone interview, was given a case study and then met with 2 people, another manager and an SVP, to present and discuss the case study. The interview experience was fine, they gave very positive feedback and told me they wanted me to come back in and meet with additional team members and would be in contact soon. I sent a thank you email directly after my interview and a follow up email a couple of weeks later. Now, almost 3 months later, no response at all. They took my proposal presented in the case study and used it online about a month later. Very disappointing and unprofessional.

Had a very positive conversation and was told I'd be coming back for a second round and also be given an assignment. Followed up, radio silence. Followed up again, nothing. It's been over a month and I have yet to get a response. Even if I wasn't the preferred candidate, it's unprofessional to ignore follow up emails. I'm so disappointed by this company and the experience.