The point is based on the multiplier of the game so if you win x2 multiplier and then x4 multiplier , that would be 6 points for you. If they cap it at 8 bets per second and you play with 2x multiplier then win atleast 4 times that would be 8 points per second ( this could be higher depending on the multiplier that the first rank uses on their autobet though )
The payout doesn't matter. Suppose you play with a 2x multiplier: that is a 49.5% chance of winning. Therefore, in 100 bets, you are expected to get 99 points. Suppose you play with a 3x multiplier: that is a 33% chance of winning. Therefore, in 100 bets, you are expected to get 99 points.
With any particular payout M you have an associated probability P and the equality can be expressed as the following: M = 1/P * 0.99
Therefore, when you want to calculate the total number of points one will get (statistically/on average), then you are going to get the expression MP * n, where n is the number of bets that one plays. Notice, though, that it expands into P/P * 0.99 * n = 0.99n. The only difference comes in volatility, but when you consider a duration of 4 hours it is a little difficult to say that they were just lucky for the entire time.