JetFuel interview questions

I applied and then they sent me a take-home React assessment. It seemed very ambitious for the 3-hour time allotment. I didn't finish it all, but they still got in touch with me to move forward with the interview process. There was a 30-minute phone screen, and then later a series of technical interviews. I was told ahead of time that the live coding portion of the interview would be in pure React. I made a point of asking if any other libraries or frameworks would be used and was told no. But when I did this part of the interview, it consisted almost entirely of setting up a Redux store, even though Redux was never mentioned either in the job description or as an answer to any of my questions about what the interview or the position would consist of. I thought there were an awful lot of backend/database architecture questions for a frontend developer interview. Also, I was told to prepare for a "product interview" by choosing a mobile app I was familiar with and preparing answers to questions about monetization, user adoption, churn, etc. This never came up in the actual interview even though I prepared for it, and I thought it was odd that these questions were part of a developer interview anyway. I didn't hear anything back until 3 business days after the day which I was told I'd hear by "at the latest".