Those who stuck by these companies are now being rewarded.Every company eventually encounters issues, and when it does, some investors will jump ship and argue that the stock is destined to underperform for a while. Unfortunately, some corporations do suffer that fate -- but others manage to turn things around. Those companies that can navigate challenging conditions and come out stronger are worth considering for long-term investors.Let's discuss two examples: Netflix (NFLX -0.47%) and Pinterest (PINS 0.41 ...