Why Did Travelzoo's Stock Grow Despite Only Modest Revenue Growth?

Travelzoo's stock gained over 80% of its value since the end of 2017 through 2019, with the stock price growing from $6 to $11. But how did the company pull off such gains, as its revenues grew only 5% during this period? Well, there is a valid reason, of course.As it turns out, one of the main...