They must have had a strong position from which to negotiate those favorable terms, in addition to the experience to know to do so, and the integrity to actually do it. The type of people you should follow.
I don't believe they did. This acquisition was by Flipkart, the poster child startup in India, who had a very high bar for hiring. They wanted to interview the non-founders to make sure they met the standard. The founders said you get all or you get none. To be fair, it was a small team of 6-8 employees, so I doubt Flipkart cared. :)
how long until he falls from staff engineer back down to senior or something less?