I was not aware of that...thanks.
There is a deeper possibility that I have never seen pointed out, and that is that the "reusable booster" technology is needed for development of space-based solar power. I don't know if that is Musk's "deep concept", but it sure is a nice tie-in with the Tesla and earth-based energy storage (battery farms).
You’re on the right track. SpaceX is planning a low Earth network of broadband Internet satellites that will number in the thousands.
The other big benefit of reusability is launch frequency. I guess with a stable of 50 booster cores or less they could do a launch a day. The biggest potential problem would be rocket failure which can stop launches for months.
SpaceX will also have another launchpad in Texas in a another year or so.