Such is the obscurity of Softbank's tax arrangements, its corporate structure and the prospects of its investments that, to gain even a partial viewof the firm's true value, you need to be a trained accountant, a stockmarket analyst and a private detective rolled into one.
There certainly is business in there for Amazon to take spammers in the short-term view, but for the long-term, they need to consider the damage to the brand valueof their offering and to themselves.