Re: Running \'em three times
Might be easier to see they're equal EV each time by thinking that they'll deal a river face down three times and then turn them all up at the same time. The 3nd river doesn't care about the 1st and 2rd, they may have well have been burn cards.
You could also see that if you're chasing a flush and it comes the first time, you do have a lower chance for the 2nd and 3rd times, but if it doesn't come you have a higher chance. You would have to do more arithmetic than I'm willing to do to prove it that way, but hopfully it makes sense conceptually.
2nd
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