Can someone explain to me how gambling companies earn money every time ?

[Veyno]

Can someone explain to me how gambling companies earn money every time ?, like is there a known maths system that they follow or something they manipulate everytime.

[ValorantChecker]

Negga calculate probabilities, they just play with odds on daily basis

100 people winning big on the same day have less odds but its possible

Where as 100 people losing money have higher odds

Apart from it they do cheap tricks to avoide payouts if not that then gambling addiction does the rest of it.

[yeorgaki]

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[Veyno]

thanks for info