To get a sense on the cost cutting, here is a good data point: Rocket Internet has lost 37% of its staff over the last months. Down from 1.496 to 937. (via, German)
A holding cutting down its own core organisation like that is as good a canary as any.
At the end of the day, Rocket Internet remains a holding building companies in difficult markets around the globe with no consumer facing scale effects of its own. It is becoming increasingly clear that this is not going to be a winning strategy.1
In fact, the main question investors should raise is wether Rocket Internet even has an overall long-term strategy.