Have you noticed, after one bet is placed they drop limits on that line to 10%. IE you place a bet on ATP Games HDP 3 hours before the match and the max bet is like 1k+ once the odds drop the dropped odds/line have a max bet like 100$ and it stays that low until market finds the new equilibrium i guess.
Annoying if you just missed to close the arb, the second line will take only 10% of what you need to bet.
Annoying if you just missed to close the arb, the second line will take only 10% of what you need to bet.