Because most punters think a bet is a safety net, not a high-wire act. You throw a horse that hasn’t moved in weeks into the same ticket as a hot favorite, and you instantly raise the stakes of every decision.
Look: a non-runner is a horse that will not start, period. No matter how you slice it, it’s a zero-probability event. Bundle one, two, three of those into a single accumulator and you’ve turned a normal wager into a lottery ticket.
Here is the deal: each non-runner drags the overall odds down by a factor of infinity. In practice the bookie’s system caps it, but the math stays brutal — multiply any number by zero and you get zero. That’s why the payout collapses unless the non-runner is mistakenly listed as a starter.
By the way, bookmakers love the “multiple non-runners” scenario because it fills the tote, inflates the pool, and keeps the house edge humming. They’ll list a horse as “withdrawn” after you place the bet, and you’re stuck watching the screen as the market recalculates.
Imagine a three-horse accumulator: Horse A at 2.0, Horse B a non-runner, Horse C at 3.5. Your stake multiplies by 2.0, then by zero, then by 3.5 — result: nada. The only way you win is if the non-runner magically re-enters, which rarely happens.
And here is why people still chase it: the thrill of the impossible. The brain lights up at the prospect of a “big win” even when logic screams “don’t”. It’s the same dopamine rush as a rollercoaster, just with money.
If you crave high returns, pick high-odds starters, not phantom entries. Use a multiple non-runners in one bet as a cautionary tale, not a template. Hedge with a single longshot, diversify across races, and keep your bankroll breathing.
Stop loading your ticket with horses that won’t run. Cut the dead weight, focus on the live competitors, and watch your expected value climb. That’s the only real edge.