It is a lot indeed.  It has to do with our strategy. We will create a reward engine to fund musicians and specific developments within the ecosystem in the early phases. In addition we need a lot of supply because of the functionality of the system, every view will execute a payment in the future.
About the ICO: we would like to keep it at  one. Though we made a reservation of 750.000.000 coins that can be used for a second ICO if development needs it. If not necessary they will be added to the reward engine.
We will explain in detail tomorrow in a blogpost.