Create an account, go to email confirm. then go back in and login, then click on the buy link, then pick one of the 5 or 6 coins you want to pay with, then send (send from your wallet so it's the axact amount they say not exchange - at least that is how i did it).
Woah, a raffle? Gambling in my gambling?
That seems... too scary. And the TOS has a giant hunk of missing text on the part describing how the ICO works