Jockey Tom Marquand said he and wife Hollie Doyle, also a leading rider, could be forced to move abroad if the funding of British racing is hit.
“It seems pretty sad we might have to think about emigrating somewhere else to make a living out of the sport that we so enjoy,” he told BBC Sport.
“It’s an important day for racing and hopefully a step in the right direction. It’s a huge industry employing 85,000 people. The effect would be enormous.”
When the BBC filmed at Windsor races on Monday, many punters were supportive of the action.
“It’s a wonderful day out and we have a little flutter,” said racegoer Alan Mills.
“Bookmakers need the money to come in to keep the business going. The sport should be promoted, rather than taking people’s livelihoods away.”
But the Betting and Gaming Council (BGC) – which represents betting shops, online betting and gaming operators and casinos – says it was not consulted.
“Racing’s decision to reschedule fixtures was taken without consultation with betting operators, whose support for the funding of the sport is mission critical,” it said in a statement.
“We are concerned that futile political gestures will only antagonise the government and frustrate punters instead of delivering a solution to a shared challenge facing both racing and betting.”