There is no issue of informed consent here. When you upload data, you consent to your allowed friends being able to view that data in whatever manner they see fit. These device specific interfaces to facebook is just an example of this. FB themselves took reasonable steps to ensure the device manufacturers adhered to the consent that users give when adding data to the site (i.e. only use the data in service to displaying it).
>The objection is that, once again, powerful information is being traded and used as leverage to drive profit
>The objection is that, once again, powerful information is being traded and used as leverage to drive profit
There's no evidence of any of this.