And each "brand" would differ from its competitors by offering a competing "ethical protocol" for the release of whistle-blowers' documents. For example, a number of potential rivals have criticized wikileaks for
...concentrating on publishing material about the US while other information was neglected.
Assuming that this is the case (although even if it is, t'was not always so), other outlets might specialise in uncovering secrets from other regimes. And thus the free market for secrets will be served.
PS. John Young's website Cryptome is here. His issues with Julian Assange appear to be many and varied, I must say.
PPS. "Ethical Protocol" turns out to be a real word. Weird: I thought I'd just made it up.