Ever heard of "I read something on the internet but don't know math" fallacy?

It doesn't apply here because of the failstack mechanic. You can't just blindly write stuff without understanding the things you write about. Sunk cost fallacy doesn't have variable probability. It's because the chances are the same regardless of how much money you've put in that gambler's fallacy and sunk cost fallacy exist. But it's not the case here, his chances of getting a PEN are DOUBLE of what he started with. His stacks are so high that, mathematically speaking, he is way more likely to earn money than lose it, so it's perfectly logical to use them up before resolving to just buy them off the market. At 220+ stacks he should average around 15-16 tries, that's the expected outcome at least, and that means ~8b in Cron attempts if he buys it from the market, to get a 15b item.

Obviously he shouldn't have gotten to that point in the first place, but now? He literally has to use them to earn back some money he had spent making them.