Whilst it pays for the service (and, in that respect, may be a necessary evil), it's morally questionable (at minimum) to charge for things that, by law, aren't yours in the first place.

Less morally questionable than claiming to users they are "buying" access to media that can be revoked at any point in the future with no recompense, of course referring to Sony and Amazon.

they're not charging for the content -- they're charging for the extra bandwidth if you want faster access