Most obviously, the two San Francisco-based companies generate the majority of their revenues from developing and operating free-to-play mobile games.
And, despite the incredible growth in this sector in recent years, neither has thrived, both struggling to grow revenues or sustain profitability.
Yet, there are now reasons to be optimistic. Both companies appointed new CEOs in 2016, and more internal rigor, combined with the release of at least one hit game during that year, has finally realised sales growth, improvements in terms of positive cash flow, and strong stock momentum.
Please note, this is video version of my original article.
Disclosure: I am/we are long ZNGA.