I think stake already talked about how they would be willing to give money instead of lambo to the person who picks it. They specifically said they would love to give the lambo away instead of cash prize because let's be honest that would be a lot better in marketing world, if you could give someone a lambo and they could take some pictures with it that would result with stake sharing there everywhere on social media and even on their website and all over the internet as "look at this guy who won lambo from us" and that would be awesome, they can't really do that with cash honestly, what are they going to do share a wallet screen shot?

Hence, they "rather" give the lambo and maybe make it a bit more tempting with some offers but in the end as long as person picks cash, they will probably give in bitcoin form instead of lambo.