I think the realistic approach would be just giving away 200 thousand dollars worth of bitcoin. Everyone will just get that money option, freebitcoin keeps their identity hidden that way and only credit you the 200 thousand dollars on their website.

Considering there is a 4% investment profit yearly for the amount of money you are keeping on their website that is about 8 thousand dollars a year too (I don't know if there is a max amount available in freebitcoin investment deal). That is a lot of money for many people in third world countries. For example it is twice the amount of minimum wage in my country per month of that income. So, I think its safe to bet that, whoever wins this lottery will most likely prefer the 200 thousand dollars and will not care about the car at all. This is literally a 200 thousand dollar lottery, not a car lottery to be honest.