Vintage Circus Jackpot

The other day while playing 500,000 bets, I got 5 Jackpots in a straight line across the board in Vintage Circus.  Screen lit up like a Christmas tree but even though the jackpot was 658,000,000+, I received 102,000,000 coins.  The jackpot went down to 100,000,000 so what happened to the other 556 million coins?