I know very little about freebitco.in apart from the fact that this is probably the most .IN website out there. Probably more popular than any domestic / international INDIAN brand.
What makes you think that it is an Indian brand, getting a .in domain does not mean that they have anything to do with India 
.However, I have a question. Since I am particularly feeling lazy today, is there anyone in the history of freebitco.in that has actually won a Lamborghini? And do these guys have a physically acquired Lamborghini in storage or display somewhere? In other words, how legit is the "giveaway'?
Even i have not heard anyone winning a Lamborghini from any of the gambling sites let alone freebitcoin 
. They are providing a giveaway and let us see whether anyone is going to win that, it will be a huge advertisement for them if someone wins but the problem with these sort of prize is that you will not be able to afford these luxury prizes as the import charges will be more than the prize of a car.