The chimpouts when things like that happen are fucking legendary. Even a sane, stable person can lose their shit when it dawns on them they've just screwed themselves out of a 7-figure jackpot.
This is exactly how it'll work with him if one of those machines pays him early enough into his fledgling gambling "career." He's undoubtedly just as good at math and probabilities as he is at pro se litigation and is the kind of person who will fall for those stupid "betting systems" like Martingale and lose his shirt in the process.
The first time I ever gambled, I fed a dollar bill into an old-school dollar slot machine and pulled the handle. It spit out eighty coins. I blinked, scooped up the winnings into one of those little buckets, cashed out and left. Russ could never do that. "Take the money and run" and "quit while you're ahead" are foreign concepts to him (and all degenerate gamblers). Or at least it gets overpowered by another thought -- "there's more where that came from."