Poker math is great for quick estimation of whether an investment (time, money, or otherwise) is worthwhile. Poker is all about risk vs. reward, and puts you into the mindset of approaching risk statistically instead of using an all-or-nothing approach. Considering investments in that way allows you to get a better sense of whether or not something is worth your time, even if there's a non-zero chance of failure (or sometimes a near 100% chance of failure for an appropriately large payoff).