Remember we are making this a hypothetical scenario for the purpose of making the argument manageable in the 1000 word count. The hypothetical is as follows:
The only distribution methods are the two above: Selling exclusively via iTunes with a 14% share to the band or selling the album via their own website using the pay what you want method
There is only digital sales in the form of full albums, no physical sales and no singles. You may treat any data on singles from the case as 1/10th of an album.
The self-release plan would be permanent, meaning not a temporary period of the first 6 or so weeks as the case mentions.
The service fee on the self release method goes to the band