So naturally I had to look at the odds, and if you pull up grab.com from archive.org you see:
"Billion Dollar Sweepstakes: GRAND PRIZE PAYABLE IN 20 ANNUAL INSTALLMENTS OF US $5,000,000 EACH, FOLLOWED BY 10 ANNUAL INSTALLMENTS OF US $10,000,000 EACH, FOLLOWED BY 9 ANNUAL INSTALLMENTS OF US $20,000,000 EACH, FOLLOWED BY A BALLOON PAYMENT OF US $620,000,000 IN THE 40TH YEAR, WITHOUT INTEREST. ODDS 1:2,404,808,340. NO PURCHASE NECESSARY. WINNER MAY TAKE IMMEDIATE PAYOUT OF US $170,000,000 INSTEAD OF ANNUITY."
So 62% of the payment came 40 years later, otherwise a payout of $170 million. Lame. Yet, I guess enough people were foolish enough to sign up for it...