With the all-tiles strategy you always hold the winning square, so every round you recover ~90% of your stake from the pot — the bleed is exactly 10% of what you deploy. In exchange you mine stake ÷ pot of the round's 1 STONK emission. Mining is profitable when your share of the emission (valued at the STONK price, minus the 10% refining fee if you cash out) exceeds the bleed. The jackpot adds 1/625 × your share × pool of expected value per round — small per round, but it compounds, and when it fires you collect your share of the entire vault including its accumulated stocks. Smaller pots mean a bigger share of the emission: if the live pot is under the break-even pot, you are being paid to mine.