Those "raffles" are so dodgy...
The prize is what 80k.. but if you check how many tickets they sell, they probably nett $500,000, give $250,000 away to charity, $80,000 to you and keep the remaining $170,000 in "administration fees"...
Just like in that 60 minutes thing about the Red Cross Bali thing with the RC keeping 1+million for "administration fees".