I think it is a useful way to double down on an investment. Rather than putting more money into the mothership, you bet on external tools that will help the mo

I think it is a useful way to double down on an investment. Rather than putting more money into the mothership, you bet on external tools that will help the mothership grow. It is also a way to reduce the costs of acquisition of the best integrations. If the majority of slack shareholders hold the majority of the shares in the best integration, it effectively lowers the price of acquisition to turn the tools built on slack into internal products/features.