Lyft Project Manager interview questions

I got on a call with the recruiter as I got recommended internally. Got 2 on site rounds. The first round was a GMAT question: how do we launch Lyft in a new city (they expect a lot and they will ask a lot of math questions) and the second interview that I had that day consisted of a product design . What is your favorite app and how would you improve it. The second round was really a disaster. I talked again to someone I interviewed in round one? it was pointless and the rest of the interviews were a mess. The problems they make you work on are their own problems and they expect you to find a solution in 30mn which is insane. On the other hand they made me prepare a presentation over the weekend about : Lyft gets into the parking management space and they basically wanted the mocks, the market size, the go to market strategy, the pilots. Basically, work for free. I felt used. I have the impression they use the interviews to get free labor. Most people I interviewed came across as rude and arrogant and had no life but work. I would not work there.