While it’s true that takeout is only imposed on winning bets, a horseplayer’s bottom line (ROI) is a function of his overall handle. The only thing that matters is whether the whale can beat the track takeout by enough to produce a profit with the rebate. If the track takeout is lowered, rebate shop handle should be unaffected (provided the track take remains marginally higher than the signal cost).
Example:
Scenario 1
Takeout = 16%
Whale rebate = 10%
Rebate shop signal cost = 5%
Rebate shop keeps 1% of whale’s volume
Whale bets $100M/yr, his net ROI before rebate is -6% for a loss of -$6M.
He gets a rebate of 10% = $10M.
His profit = -$6M + $10M = $4M.
The rebate shop keeps 1% of whale’s volume = $1M.
Scenario 2
Takeout is reduced by 6% to 10%
Rebate shop reduces rebate by 6% to 4%
Rebate shop signal cost remains 5%
Rebate shop continues to keep 1% of whale’s volume
Whale bets same $100M/yr, and because of the lower takeout, his net ROI before rebates is now break-even (-6% +6% = 0%).
He gets a rebate of 4% = $4M.
His profit = $0M + $4M = $4M, the same as before.
The rebate shop takes 1% of whale’s volume = $1M, the same as before.
So a reduced takeout shouldn’t affect the rebate shop because the whale still makes the same net profit and therefore pushes through the same volume to the rebate shop.
It’s the source market fees like the 10% fee imposed by Pennsylvania that will kill the rebate handle, because these costs have to be absorbed by either the whale or the rebate shop. If the rebate shop passes them along to the whale, the less profitable whales will be forced out of business. Ditto for the rebate shops if they try to absorb it themselves.