To some degree it answers why they are raising money in the first place.
Agreed, though, his essay doesn't answer either (A) Why $2.7B in particular, and (B) Why in just three years - other than the fact that purpose people believe in their approach so much that it was easy to do so.
Agreed. The essay answers the question, why is A2Z awesome... but it doesn't provide any reason as to why they want to raise so much (e.g. they see the need to be able to invest hundreds of millions into certain companies), and why now (e.g. there's an epic shift in mobile/internet so it's necessary to invest now).
Agreed, though, his essay doesn't answer either (A) Why $2.7B in particular, and (B) Why in just three years - other than the fact that purpose people believe in their approach so much that it was easy to do so.