Imubit Algorithm Developer interview questions

First an easy screening video call, and then a very big homework to solve at home. They themselves say it takes 1 or 2 days to solve, which is much longer than any other homework - generally it's at most 2-3 hours. And you're not even sure this will get anywhere. In most companies the homework is much shorter, or is at a more advanced stage of the process. I thought it was disproprotionate and declined. I don't know who would accept when so many companies have processes as efficient or more but less time consuming.