I'd say they are referring to some kind of protocol, network or application fingerprint.

For example, all connections to standard VPN ports.

On Aug 2, 2013 12:28 PM, "Lee Azzarello" <lee@guardianproject.info> wrote:
Do you think Amazon and Rackspace count as "VPN Startups"?

-lee

On Thu, Aug 1, 2013 at 7:27 AM, Faraz <faraz_mah@lavabit.com> wrote:
> What's are peoples take on slide 17?
>
> "Show me all VPN startups in country X, and give me data so I can
> decrypt and discover user"
> http://www.theguardian.com/world/interactive/2013/jul/31/nsa-xkeyscore-program-full-presentation
>