I had two interviews with the Curate Insights (partner company to Curate Partners). At the end of my first interview I was told I would here back in a day or two. I never heard anything, so I sent a follow-up email. They scheduled a second interview with me. After the second interview I was told that I would hear back from them after the weekend and we would schedule a time for the third interview. I never heard back and I wasn't going to follow up again. Ghosting candidates after two interviews is very unprofessional.
My advice, if you don't hear back right away after the first interview, don't waste your time reaching out.