Penguin Random House interview questions

First round: take home writing assignment about data science and publishing. Second round: Phone call interview with hiring manager. Third round: On-site interview with DS and behavioral questions. It was a very promising hiring journey. After the third round, i was even taken aside and the hiring manager was trying to convince me that the job was great and if I accepted I would not regret it. When I returned home, I sent a follow up, confirming my interest in the role. I was then ghosted. I sent 3 follow up- emails (not including the one after the onsite) and nobody ever responded to me. Pretty disrespectful to ghost; especially after how much time and effort went into the process. Turns out they went with an internal hire.