Dinner at 5 (4), the 4-5 favorite, rallied to beat Shez Stuck Up by a neck in Tuesday's fourth race at Gulfstream Park.
It was the first leg in the Rainbow 6, which has an "all must be paid out" carryover of $407,675.
Bettors added $3,478,915 to the Rainbow 6 pool. Guklfstream had projected that today's Rainbow 6 would draw about $2.5 million.
The fifth race will bev the start of the Late Pick 5, on which there also will be no carryhover.