According to this:
. This FREE NFT includes a chance to win a pair of flyaway tickets to the 64th GRAMMY Awards® to be held in Las Vegas on Sunday April 3rd, 2022! A winner will be randomly selected on Thursday, March 17th*.
I don't know but I don't think there are free NFT tokens due to the high gas costs which means that the party creating the token will lose a lot of money for nothing.
Therefore, it is either on central networks with cheap fees, such as BSC, or it is a database on a site.
Overall, it seems like an opportunity to win free tickets and the selection will be random.