It sounds like Stypi was an acquihire.

Jason Chen, one of the founders wrote a blog post about it: Mechanics of a Small Acquisition (http://www.jasonchen.me/mechanics-of-a-small-acquisition/).

> Fortunately, my cofounder and I were lucky enough to have had access to several other acquired founders who helped us ultimately navigate our first multimillion-dollar exit for a company barely a year old.

> DISCLAIMER: Every startup and founder group is unique so the data provided here may not apply in all cases. In particular, it is skewed towards < $25m acquisitions made by much larger companies.

(Emphasis mine)