In this segment from Market Foolery, host Mac Greer, Million Dollar Portfolio‘s Matt Argersinger, and Supernova and Rule Breakers‘ Aaron Bush dip into the Fool mailbag and find a request for them to explain a bit of investing arcana. Last week, Market Foolery commentators noted that streaming video leader Netflix (NASDAQ: NFLX) was profitable last quarter, but also cash-flow-negative. In short, wondered the listener, how can those two states coexist?