The document summarizes five common mistakes made in marketing freemium mobile apps: 1) misunderstanding lifetime customer value (LTV), treating it as linear or immediate rather than a future cash flow; 2) misunderstanding platform featuring, seeing it as guaranteed rather than optional; 3) misunderstanding mobile ad networks, not recognizing their costs and limited inventory; 4) misunderstanding cost per install (CPI), treating it as constant rather than dependent on multiple factors; and 5) misunderstanding chart dynamics, seeing top app placement as substituting for quality rather than potentially offsetting acquisition costs if LTV is high enough.