Clearly they had plenty of customers given that 150K people are stranded.
So the reason they collapsed is because their cost structure wasn't aligned to serve the volume of business they conducted.
So the reason they collapsed is because their cost structure wasn't aligned to serve the volume of business they conducted.
Although they may have had 150k stranded customers it seems they were left with a low yielding segment selling products the market didn't need.
600K if you include people from other countries.